feat: add more config options

README.md

@@ -38,12 +38,16 @@ vim.cmd.colorscheme("gruber-darker")
 ```lua
 {
   bold = true,
+  inverse = {
+    signs = true,
+  },
   italic = {
     strings = true,
     comments = true,
     operators = false,
     folds = true,
   },
+  undercurl = true,
   underline = true,
 }
 ```

lua/gruber-darker/config.lua

@@ -4,8 +4,13 @@
 ---|"operators"
 ---|"folds"
 
+---@alias InvertType
+---|"signs"
+---|"tabline"
+
 ---@class GruberDarkerOpts
 ---@field bold boolean
+---@field invert table<InvertType, boolean>
 ---@field italic table<ItalicType, boolean>
 ---@field undercurl boolean
 ---@field underline boolean
@@ -13,13 +18,17 @@
 ---@type GruberDarkerOpts
 local DEFAULTS = {
 	bold = true,
+	invert = {
+		signs = true,
+		tabline = false,
+	},
 	italic = {
 		strings = true,
 		comments = true,
 		operators = false,
 		folds = true,
 	},
-	-- undercurl = true,
+	undercurl = true,
 	underline = true,
 }
 

lua/gruber-darker/highlights/colorscheme.lua

@@ -0,0 +1,82 @@
+local Highlight = require("gruber-darker.highlight")
+local c = require("gruber-darker.palette").default
+local config = require("gruber-darker.config").get_opts()
+
+---@type HighlightsProvider
+local M = {
+	highlights = {},
+}
+
+---Set GruberDarker-specific highlights
+function M.setup()
+	for _, value in pairs(M.highlights) do
+		value:setup()
+	end
+end
+
+-- Highlights inspired by
+-- https://github.com/ellisonleao/gruvbox.nvim/blob/main/lua/gruvbox/groups.lua#L43
+
+-- Colors
+
+M.highlights.fg0 = Highlight.new("GruberDarkerFg0", { fg = c.fg })
+M.highlights.fg1 = Highlight.new("GruberDarkerFg1", { fg = c["fg+1"] })
+M.highlights.fg2 = Highlight.new("GruberDarkerFg2", { fg = c["fg+2"] })
+
+M.highlights.bg_1 = Highlight.new("GruberDarkerBg-1", { fg = c["bg-1"] })
+M.highlights.bg0 = Highlight.new("GruberDarkerBg0", { fg = c.bg })
+M.highlights.bg1 = Highlight.new("GruberDarkerBg1", { fg = c["bg+1"] })
+M.highlights.bg2 = Highlight.new("GruberDarkerBg2", { fg = c["bg+2"] })
+M.highlights.bg3 = Highlight.new("GruberDarkerBg3", { fg = c["bg+3"] })
+M.highlights.bg4 = Highlight.new("GruberDarkerBg4", { fg = c["bg+4"] })
+
+M.highlights.dark_red = Highlight.new("GruberDarkerDarkRed", { fg = c["red-1"] })
+M.highlights.dark_red_bold = Highlight.new("GruberDarkerDarkRedBold", { fg = c["red-1"], bold = config.bold })
+M.highlights.red = Highlight.new("GruberDarkerRed", { fg = c.red })
+M.highlights.red_bold = Highlight.new("GruberDarkerRedBold", { fg = c.red, bold = config.bold })
+M.highlights.light_red = Highlight.new("GruberDarkerLightRed", { fg = c["red+1"] })
+M.highlights.light_red_bold = Highlight.new("GruberDarkerLightRedBold", { fg = c["red+1"], bold = config.bold })
+
+M.highlights.green = Highlight.new("GruberDarkerGreen", { fg = c.green })
+M.highlights.green_bold = Highlight.new("GruberDarkerGreenBold", { fg = c.green, bold = config.bold })
+
+M.highlights.yellow = Highlight.new("GruberDarkerYellow", { fg = c.yellow })
+M.highlights.green_bold = Highlight.new("GruberDarkerYellowBold", { fg = c.yellow, bold = config.bold })
+
+M.highlights.brown = Highlight.new("GruberDarkerBrown", { fg = c.brown })
+M.highlights.brown_bold = Highlight.new("GruberDarkerBrownBold", { fg = c.brown, bold = config.bold })
+
+M.highlights.quartz = Highlight.new("GruberDarkerQuartz", { fg = c.quartz })
+M.highlights.quartz_bold = Highlight.new("GruberDarkerQuartzBold", { fg = c.quartz, bold = config.bold })
+
+M.highlights.darker_niagara = Highlight.new("GruberDarkerDarkestNiagara", { fg = c["niagara-2"] })
+M.highlights.darker_niagara_bold =
+	Highlight.new("GruberDarkerDarkestNiagaraBold", { fg = c["niagara-2"], bold = config.bold })
+M.highlights.dark_niagara = Highlight.new("GruberDarkerDarkNiagara", { fg = c["niagara-1"] })
+M.highlights.dark_niagara_bold =
+	Highlight.new("GruberDarkerDarkNiagaraBold", { fg = c["niagara-1"], bold = config.bold })
+M.highlights.niagara = Highlight.new("GruberDarkerNiagara", { fg = c.niagara })
+M.highlights.niagara_bold = Highlight.new("GruberDarkerNiagaraBold", { fg = c.niagara, bold = config.bold })
+
+M.highlights.wisteria = Highlight.new("GruberDarkerWisteria", { fg = c.wisteria })
+M.highlights.wisteria_bold = Highlight.new("GruberDarkerWisteriaBold", { fg = c.wisteria, bold = config.bold })
+
+-- Signs
+
+M.highlights.red_sign = Highlight.new("GruberDarkerRedSign", { fg = c.red, bg = c.bg, reverse = config.invert.signs })
+M.highlights.quartz_sign =
+	Highlight.new("GruberDarkerQuartzSign", { fg = c.quartz, bg = c.bg, reverse = config.invert.signs })
+M.highlights.niagara_sign =
+	Highlight.new("GruberDarkerNiagaraSign", { fg = c.niagara, bg = c.bg, reverse = config.invert.signs })
+M.highlights.wisteria_sign =
+	Highlight.new("GruberDarkerWisteriaSign", { fg = c.wisteria, bg = c.bg, reverse = config.invert.signs })
+
+-- Underlines
+
+M.highlights.red_underline = Highlight.new("GruberDarkerRedUnderline", { sp = c.red, undercurl = config.undercurl })
+M.highlights.quartz_underline =
+	Highlight.new("GruberDarkerQuartzUnderline", { sp = c.quartz, undercurl = config.undercurl })
+M.highlights.niagara_underline =
+	Highlight.new("GruberDarkerNiagaraUnderline", { sp = c.niagara, undercurl = config.undercurl })
+M.highlights.wisteria_underline =
+	Highlight.new("GruberDarkerWisteriaUnderline", { sp = c.wisteria, undercurl = config.undercurl })

lua/gruber-darker/highlights/init.lua

@@ -1,6 +1,11 @@
 local M = {}
 
+---@class HighlightsProvider
+---@field highlights table<string, Highlight>
+
+---@type HighlightsProvider[]
 local providers = {
+	-- require("gruber-darker.highlights.colorscheme"),
 	require("gruber-darker.highlights.vim"),
 	require("gruber-darker.highlights.terminal"),
 	require("gruber-darker.highlights.treesitter"),
@@ -8,8 +13,8 @@ local providers = {
 
 ---Set highlights for configured providers
 function M.setup()
-	for _, highlights in ipairs(providers) do
-		highlights:setup()
+	for _, provider in ipairs(providers) do
+		provider:setup()
 	end
 end
 

lua/gruber-darker/highlights/terminal.lua

@@ -1,5 +1,6 @@
 local c = require("gruber-darker.palette")
 
+---@type HighlightsProvider
 local M = {}
 
 ---Set Neovim terminal colors

lua/gruber-darker/highlights/treesitter.lua

@@ -1,10 +1,10 @@
-local c = require("gruber-darker.palette")
+local c = require("gruber-darker.palette").default
 local opts = require("gruber-darker.config").get_opts()
 local vim_hl = require("gruber-darker.highlights.vim").highlights
 local Highlight = require("gruber-darker.highlight")
 
+---@type HighlightsProvider
 local M = {
-	---@type table<string, Highlight>
 	highlights = {},
 }
 
@@ -17,21 +17,21 @@ end
 
 -- These groups are for the neovim tree-sitter highlights.
 -- As of writing, tree-sitter support is a WIP, group names may change.
--- By default, most of these groups link to an appropriate Vim group,
+-- By, most of these groups link to an appropriate Vim group,
 -- TSError -> Error for example, so you do not have to define these unless
 -- you explicitly want to support Treesitter's improved syntax awareness.
 
 -- TSAnnotation        = Highlight.new("", { })    -- For C++/Dart attributes, annotations that can be attached to the code to denote some kind of meta information.
 -- TSAttribute         = Highlight.new("", { })    -- (unstable) TODO: docs
-M.highlights.boolean = Highlight.new("TSBoolean", { fg = c.default.quartz }) -- For booleans.
+M.highlights.boolean = Highlight.new("TSBoolean", { fg = c.quartz }) -- For booleans.
 M.highlights.character = Highlight.new("TSCharacter", { link = vim_hl.character }) -- For characters.
 M.highlights.comment = Highlight.new("TSComment", { link = vim_hl.comment }) -- For comment blocks.
 -- TSNote = Highlight.new("TSNote", { fg = c.bg, bg = c.info })
-M.highlights.text_warning = Highlight.new("@text.warning", { fg = c.default.red })
-M.highlights.text_danger = Highlight.new("@text.danger", { fg = c.default.white, bg = c.default.red })
+M.highlights.text_warning = Highlight.new("@text.warning", { fg = c.red })
+M.highlights.text_danger = Highlight.new("@text.danger", { fg = c.white, bg = c.red })
 -- ["@constructor"] = Highlight.new("", { fg = c.magenta }, -- For constructor calls and definitions: `= { })` in Lua, and Java constructors.
-M.highlights.conditional = Highlight.new("TSConditional", { fg = c.default.yellow }) -- For keywords related to conditionnals.
-M.highlights.constant = Highlight.new("TSConstant", { fg = c.default.quartz }) -- For constants
+M.highlights.conditional = Highlight.new("TSConditional", { fg = c.yellow }) -- For keywords related to conditionnals.
+M.highlights.constant = Highlight.new("TSConstant", { fg = c.quartz }) -- For constants
 -- TSConstBuiltin      = Highlight.new("", { })    -- For constant that are built in the language: `nil` in Lua.
 -- TSConstMacro        = Highlight.new("", { })    -- For constants that are defined by macros: `NULL` in C.
 -- TSError             = Highlight.new("", { })    -- For syntax/parser errors.
@@ -66,7 +66,7 @@ M.highlights.string = Highlight.new("TSString", { link = vim_hl.string })
 -- TSSymbol            = Highlight.new("", { })    -- For identifiers referring to symbols or atoms.
 
 ---For types.
-M.highlights.type = Highlight.new("TSType", { fg = c.default.quartz })
+M.highlights.type = Highlight.new("TSType", { fg = c.quartz })
 -- TSTypeBuiltin       = Highlight.new("", { })    -- For builtin types.
 -- ["@variable"] = Highlight.new("", { style = options.styles.variables }) -- Any variable name that does not have another highlight.
 -- ["@variable.builtin"] = Highlight.new("", { fg = c.red }) -- Variable names that are defined by the languages, like `this` or `self`.
@@ -82,7 +82,7 @@ M.highlights.type = Highlight.new("TSType", { fg = c.default.quartz })
 -- TSLiteral           = Highlight.new("", { })    -- Literal text.
 
 ---Any URI like a link or email.
-M.highlights.uri = Highlight.new("TSURI", { fg = c.default.niagara, underline = opts.underline })
+M.highlights.uri = Highlight.new("TSURI", { fg = c.niagara, underline = opts.underline })
 
 M.highlights.text_diff_add = Highlight.new("@text.diff.add", { link = vim_hl.diff_add })
 M.highlights.text_diff_delete = Highlight.new("@text.diff.delete", { link = vim_hl.diff_delete })

lua/gruber-darker/highlights/vim.lua

@@ -1,9 +1,9 @@
 local Highlight = require("gruber-darker.highlight")
-local c = require("gruber-darker.palette")
+local c = require("gruber-darker.palette").default
 local opts = require("gruber-darker.config").get_opts()
 
+---@type HighlightsProvider
 local M = {
-	---@type table<string, Highlight>
 	highlights = {},
 }
 
@@ -15,94 +15,93 @@ function M.setup()
 end
 
 ---any comment
-M.highlights.comment = Highlight.new("Comment", { fg = c.default.brown, italic = opts.italic.comments })
+M.highlights.comment = Highlight.new("Comment", { fg = c.brown, italic = opts.italic.comments })
 ---used for the columns set with 'colorcolumn'
-M.highlights.color_column = Highlight.new("ColorColumn", { bg = c.default["bg+2"] })
+M.highlights.color_column = Highlight.new("ColorColumn", { bg = c["bg+2"] })
 ---placeholder characters substituted for concealed text (see 'conceallevel')
-M.highlights.conceal = Highlight.new("Conceal", { fg = c.default.fg, bg = c.default.bg })
+M.highlights.conceal = Highlight.new("Conceal", { fg = c.fg, bg = c.bg })
 ---character under the cursor
-M.highlights.cursor = Highlight.new("Cursor", { bg = c.default.yellow })
+M.highlights.cursor = Highlight.new("Cursor", { bg = c.yellow })
 ---the character under the cursor when |language-mapping| is used (see 'guicursor')
-M.highlights.l_cursor = Highlight.new("lCursor", { fg = c.default.none, bg = c.default.yellow })
+M.highlights.l_cursor = Highlight.new("lCursor", { fg = c.none, bg = c.yellow })
 ---like Cursor, but used when in IME mode |CursorIM|
-M.highlights.cursor_im = Highlight.new("CursorIM", { fg = c.default.none, bg = c.default.yellow })
+M.highlights.cursor_im = Highlight.new("CursorIM", { fg = c.none, bg = c.yellow })
 ---Screen-column at the cursor, when 'cursorcolumn' is set.
-M.highlights.cursor_column = Highlight.new("CursorColumn", { bg = c.default["bg+2"] })
+M.highlights.cursor_column = Highlight.new("CursorColumn", { bg = c["bg+2"] })
 ---Screen-line at the cursor, when 'cursorline' is set.  Low-priority if foreground (ctermfg OR guifg) is not set.
-M.highlights.cursor_line = Highlight.new("CursorLine", { bg = c.default["bg+1"] })
----Directory = Highlight.new("Directory", { fg = c.default.lightblue }) ---directory names (and other special names in listings)
+M.highlights.cursor_line = Highlight.new("CursorLine", { bg = c["bg+1"] })
+---Directory = Highlight.new("Directory", { fg = c.lightblue }) ---directory names (and other special names in listings)
 
 ---diff mode: Added line |diff.txt|
-M.highlights.diff_add = Highlight.new("DiffAdd", { fg = c.default.green, bg = c.default.none })
+M.highlights.diff_add = Highlight.new("DiffAdd", { fg = c.green, bg = c.none })
 ---diff mode: Changed line |diff.txt|
-M.highlights.diff_change = Highlight.new("DiffChange", { fg = c.default.yellow, bg = c.default.none })
+M.highlights.diff_change = Highlight.new("DiffChange", { fg = c.yellow, bg = c.none })
 ---diff mode: Deleted line |diff.txt|
-M.highlights.diff_delete = Highlight.new("DiffDelete", { fg = c.default["red+1"], bg = c.default.none })
+M.highlights.diff_delete = Highlight.new("DiffDelete", { fg = c["red+1"], bg = c.none })
 ---diff mode: Changed text within a changed line |diff.txt|
-M.highlights.diff_text = Highlight.new("DiffText", { fg = c.default.yellow, bg = c.default.none })
----filler lines (~) after the end of the buffer.  By default, this is highlighted like |hl-NonText|.
-M.highlights.end_of_buffer = Highlight.new("EndOfBuffer", { fg = c.default["bg+4"], bg = c.default.none })
+M.highlights.diff_text = Highlight.new("DiffText", { fg = c.yellow, bg = c.none })
+---filler lines (~) after the end of the buffer.  By, this is highlighted like |hl-NonText|.
+M.highlights.end_of_buffer = Highlight.new("EndOfBuffer", { fg = c["bg+4"], bg = c.none })
 ---cursor in a focused terminal
-M.highlights.term_cursor = Highlight.new("TermCursor", { bg = c.default.yellow })
+M.highlights.term_cursor = Highlight.new("TermCursor", { bg = c.yellow })
 ---TermCursorNC= { }, ---cursor in an unfocused terminal
 
 ---error messages on the command line
-M.highlights.error_msg = Highlight.new("ErrorMsg", { fg = c.default.white, bg = c.default.red })
+M.highlights.error_msg = Highlight.new("ErrorMsg", { fg = c.white, bg = c.red })
 ---the column separating vertically split windows
-M.highlights.vert_split = Highlight.new("VertSplit", { fg = c.default["fg+2"], bg = c.default["bg+1"] })
+M.highlights.vert_split = Highlight.new("VertSplit", { fg = c["fg+2"], bg = c["bg+1"] })
 ---the column separating vertically split windows
-M.highlights.win_separator = Highlight.new("WinSeparator", { fg = c.default["bg+2"], bold = opts.bold })
+M.highlights.win_separator = Highlight.new("WinSeparator", { fg = c["bg+2"], bold = opts.bold })
 ---line used for closed folds
-M.highlights.folded =
-	Highlight.new("Folded", { fg = c.default.brown, bg = c.default["fg+2"], italic = opts.italic.folds })
+M.highlights.folded = Highlight.new("Folded", { fg = c.brown, bg = c["fg+2"], italic = opts.italic.folds })
 ---'foldcolumn'
-M.highlights.fold_column = Highlight.new("FoldColumn", { fg = c.default.brown, bg = c.default["fg+2"] })
+M.highlights.fold_column = Highlight.new("FoldColumn", { fg = c.brown, bg = c["fg+2"] })
 ---column where |signs| are displayed
-M.highlights.sign_column = Highlight.new("SignColumn", { fg = c.default["bg+2"], bg = c.default.none })
+M.highlights.sign_column = Highlight.new("SignColumn", { fg = c["bg+2"], bg = c.none })
 ---SignColumnSB = Highlight.new("SignColumnSB", { bg = c.bg_sidebar, fg = c.fg_gutter }) ---column where |signs| are displayed
 ---Substitute = Highlight.new("Substitute", { bg = c.red, fg = c.black }) ---|:substitute| replacement text highlighting
 ---Line number for ":number" and ":#" commands, and when 'number' or 'relativenumber' option is set.
-M.highlights.line_number = Highlight.new("LineNr", { fg = c.default["bg+4"] })
+M.highlights.line_number = Highlight.new("LineNr", { fg = c["bg+4"] })
 ---Like LineNr when 'cursorline' or 'relativenumber' is set for the cursor line.
-M.highlights.cursor_line_number = Highlight.new("CursorLineNr", { fg = c.default.yellow })
+M.highlights.cursor_line_number = Highlight.new("CursorLineNr", { fg = c.yellow })
 ---The character under the cursor or just before it, if it is a paired bracket, and its match. |pi_paren.txt|
-M.highlights.match_paren = Highlight.new("MatchParen", { fg = c.default.fg, bg = c.default.wisteria })
+M.highlights.match_paren = Highlight.new("MatchParen", { fg = c.fg, bg = c.wisteria })
 ---'showmode' message (e.g., "---INSERT ---")
-M.highlights.mode_msg = Highlight.new("ModeMsg", { fg = c.default["fg+2"] })
+M.highlights.mode_msg = Highlight.new("ModeMsg", { fg = c["fg+2"] })
 ---MsgArea = Highlight.new("MsgArea", { fg = c.fg_dark }) ---Area for messages and cmdline
 ---MsgSeparator= { }, ---Separator for scrolled messages, `msgsep` flag of 'display'
 ---|more-prompt|
-M.highlights.more_msg = Highlight.new("MoreMsg", { fg = c.default["fg+2"] })
+M.highlights.more_msg = Highlight.new("MoreMsg", { fg = c["fg+2"] })
 ---'@' at the end of the window, characters from 'showbreak' and other characters that do not really exist in the text (e.g., ">" displayed when a double-wide character doesn't fit at the end of the line). See also |hl-EndOfBuffer|.
-M.highlights.non_text = Highlight.new("NonText", { fg = c.default["fg+2"] })
+M.highlights.non_text = Highlight.new("NonText", { fg = c["fg+2"] })
 ---normal text
-M.highlights.normal = Highlight.new("Normal", { fg = c.default.fg, bg = c.default.bg })
+M.highlights.normal = Highlight.new("Normal", { fg = c.fg, bg = c.bg })
 ---normal text in non-current windows
-M.highlights.normal_non_current = Highlight.new("NormalNC", { fg = c.default.fg, bg = c.default["bg-1"] })
+M.highlights.normal_non_current = Highlight.new("NormalNC", { fg = c.fg, bg = c["bg-1"] })
 ---normal text in sidebar
-M.highlights.normal_sidebar = Highlight.new("NormalSB", { fg = c.default.fg, bg = c.default["bg-1"] })
+M.highlights.normal_sidebar = Highlight.new("NormalSB", { fg = c.fg, bg = c["bg-1"] })
 ---Normal text in floating windows.
-M.highlights.normal_float = Highlight.new("NormalFloat", { fg = c.default.fg, bg = c.default.bg })
-M.highlights.float_border = Highlight.new("FloatBorder", { fg = c.default["bg+2"], bg = c.default["bg-1"] })
+M.highlights.normal_float = Highlight.new("NormalFloat", { fg = c.fg, bg = c.bg })
+M.highlights.float_border = Highlight.new("FloatBorder", { fg = c["bg+2"], bg = c["bg-1"] })
 ---Popup menu: normal item.
-M.highlights.popup_menu = Highlight.new("Pmenu", { fg = c.default.fg, bg = c.default["bg+1"] })
+M.highlights.popup_menu = Highlight.new("Pmenu", { fg = c.fg, bg = c["bg+1"] })
 ---Popup menu: selected item.
-M.highlights.popup_menu_sel = Highlight.new("PmenuSel", { fg = c.default.fg, bg = c.default["bg+2"] })
+M.highlights.popup_menu_sel = Highlight.new("PmenuSel", { fg = c.fg, bg = c["bg+2"] })
 ---Popup menu: scrollbar.
-M.highlights.popup_menu_sidebar = Highlight.new("PmenuSbar", { bg = c.default.bg })
+M.highlights.popup_menu_sidebar = Highlight.new("PmenuSbar", { bg = c.bg })
 ---Popup menu: Thumb of the scrollbar.
-M.highlights.popup_menu_thumb = Highlight.new("PmenuThumb", { bg = c.default.bg })
+M.highlights.popup_menu_thumb = Highlight.new("PmenuThumb", { bg = c.bg })
 ---|hit-enter| prompt and yes/no questions
-M.highlights.question = Highlight.new("Question", { fg = c.default.niagara })
+M.highlights.question = Highlight.new("Question", { fg = c.niagara })
 ---Current |quickfix| item in the quickfix window. Combined with |hl-CursorLine| when the cursor is there.
-M.highlights.quick_fix_line = Highlight.new("QuickFixLine", { bg = c.default["bg+2"], bold = opts.bold })
+M.highlights.quick_fix_line = Highlight.new("QuickFixLine", { bg = c["bg+2"], bold = opts.bold })
 ---Last search pattern highlighting (see 'hlsearch').  Also used for similar items that need to stand out.
-M.highlights.search = Highlight.new("Search", { fg = c.default.black, bg = c.default.yellow })
+M.highlights.search = Highlight.new("Search", { fg = c.black, bg = c.yellow })
 ---'incsearch' highlighting; also used for the text replaced with ":s///c"
-M.highlights.incremental_search = Highlight.new("IncSearch", { fg = c.default.black, bg = c.default["fg+2"] })
+M.highlights.incremental_search = Highlight.new("IncSearch", { fg = c.black, bg = c["fg+2"] })
 M.highlights.current_search = Highlight.new("CurSearch", { link = M.highlights.incremental_search })
 ---Unprintable characters: text displayed differently from what it really is.  But not 'listchars' whitespace. |hl-Whitespace|
-M.highlights.special_key = Highlight.new("SpecialKey", { fg = c.default["fg+2"] })
+M.highlights.special_key = Highlight.new("SpecialKey", { fg = c["fg+2"] })
 ---Word that is not recognized by the spellchecker. |spell| Combined with the highlighting used otherwise.
 M.highlights.spell_bad = Highlight.new("SpellBad", { undercurl = true })
 ---Word that should start with a capital. |spell| Combined with the highlighting used otherwise.
@@ -112,89 +111,88 @@ M.highlights.spell_local = Highlight.new("SpellLocal", { undercurl = true })
 ---Word that is recognized by the spellchecker as one that is hardly ever used.  |spell| Combined with the highlighting used otherwise.
 M.highlights.spell_rare = Highlight.new("SpellRare", { undercurl = true })
 ---status line of current window
-M.highlights.status_line = Highlight.new("StatusLine", { fg = c.default.white, bg = c.default["bg+1"] })
+M.highlights.status_line = Highlight.new("StatusLine", { fg = c.white, bg = c["bg+1"] })
 ---status lines of not-current windows Note: if this is equal to "StatusLine" Vim will use "^^^" in the status line of the current window.
-M.highlights.status_line_non_current = Highlight.new("StatusLineNC", { fg = c.default.quartz, bg = c.default["bg+1"] })
+M.highlights.status_line_non_current = Highlight.new("StatusLineNC", { fg = c.quartz, bg = c["bg+1"] })
 ---tab pages line, not active tab page label
-M.highlights.tab_line = Highlight.new("TabLine", { bg = c.default.none })
+M.highlights.tab_line = Highlight.new("TabLine", { bg = c.none })
 ---tab pages line, where there are no labels
-M.highlights.tab_line_fill = Highlight.new("TabLineFill", { fg = c.default["bg+4"], bg = c.default["bg+1"] })
+M.highlights.tab_line_fill = Highlight.new("TabLineFill", { fg = c["bg+4"], bg = c["bg+1"] })
 ---tab pages line, active tab page label
-M.highlights.tab_line_sel =
-	Highlight.new("TabLineSel", { fg = c.default.yellow, bg = c.default.none, bold = opts.bold })
+M.highlights.tab_line_sel = Highlight.new("TabLineSel", { fg = c.yellow, bg = c.none, bold = opts.bold })
 ---titles for output from ":set all", ":autocmd" etc.
-M.highlights.title = Highlight.new("Title", { fg = c.default.quartz })
+M.highlights.title = Highlight.new("Title", { fg = c.quartz })
 ---Visual mode selection
-M.highlights.visual = Highlight.new("Visual", { bg = c.default["bg+2"] })
+M.highlights.visual = Highlight.new("Visual", { bg = c["bg+2"] })
 ---Visual mode selection when vim is "Not Owning the Selection".
-M.highlights.visual_nos = Highlight.new("VisualNOS", { fg = c.default.red })
+M.highlights.visual_nos = Highlight.new("VisualNOS", { fg = c.red })
 ---warning messages
-M.highlights.warning_msg = Highlight.new("WarningMsg", { fg = c.default.red })
+M.highlights.warning_msg = Highlight.new("WarningMsg", { fg = c.red })
 ---"nbsp", "space", "tab" and "trail" in 'listchars'
-M.highlights.whitespace = Highlight.new("Whitespace", { fg = c.default["bg+4"], bg = c.default.none })
+M.highlights.whitespace = Highlight.new("Whitespace", { fg = c["bg+4"], bg = c.none })
 ---current match in 'wildmenu' completion
-M.highlights.wild_menu = Highlight.new("WildMenu", { fg = c.default.black, bg = c.default.yellow })
----These groups are not listed as default vim groups,
+M.highlights.wild_menu = Highlight.new("WildMenu", { fg = c.black, bg = c.yellow })
+---These groups are not listed as vim groups,
 ---but they are defacto standard group names for syntax highlighting.
 ---commented out groups should chain up to their "preferred" group by
----default,
+--,
 ---Uncomment and edit if you want more specific syntax highlighting.
 
 ---(preferred) any constant
-M.highlights.constant = Highlight.new("Constant", { fg = c.default.quartz })
+M.highlights.constant = Highlight.new("Constant", { fg = c.quartz })
 ---  a string constant: "this is a string"
-M.highlights.string = Highlight.new("String", { fg = c.default.green, italic = opts.italic.strings })
+M.highlights.string = Highlight.new("String", { fg = c.green, italic = opts.italic.strings })
 --- a character constant: 'c', '\n'
-M.highlights.character = Highlight.new("Character", { fg = c.default.green, italic = opts.italic.strings })
+M.highlights.character = Highlight.new("Character", { fg = c.green, italic = opts.italic.strings })
 ---  a number constant: 234, 0xff
-M.highlights.number = Highlight.new("Number", { fg = c.default.fg })
+M.highlights.number = Highlight.new("Number", { fg = c.fg })
 --- a boolean constant: TRUE, false
-M.highlights.boolean = Highlight.new("Boolean", { fg = c.default.yellow, bold = opts.bold })
+M.highlights.boolean = Highlight.new("Boolean", { fg = c.yellow, bold = opts.bold })
 ---   a floating point constant: 2.3e10
-M.highlights.float = Highlight.new("Float", { fg = c.default.yellow, bold = opts.bold })
+M.highlights.float = Highlight.new("Float", { fg = c.yellow, bold = opts.bold })
 ---(preferred) any variable name
-M.highlights.identifier = Highlight.new("Identifier", { fg = c.default["fg+1"] })
+M.highlights.identifier = Highlight.new("Identifier", { fg = c["fg+1"] })
 ---function name (also: methods for classes)
-M.highlights.func = Highlight.new("Function", { fg = c.default.niagara })
+M.highlights.func = Highlight.new("Function", { fg = c.niagara })
 ---(preferred) any statement
-M.highlights.statement = Highlight.new("Statement", { fg = c.default.yellow })
+M.highlights.statement = Highlight.new("Statement", { fg = c.yellow })
 ---if, then, else, endif, switch, etc.
-M.highlights.conditional = Highlight.new("Conditional", { fg = c.default.yellow, bold = opts.bold })
+M.highlights.conditional = Highlight.new("Conditional", { fg = c.yellow, bold = opts.bold })
 ---for, do, while, etc.
-M.highlights.repeats = Highlight.new("Repeat", { fg = c.default.yellow, bold = opts.bold })
----case, default, etc.
-M.highlights.label = Highlight.new("Label", { fg = c.default.yellow, bold = opts.bold })
+M.highlights.repeats = Highlight.new("Repeat", { fg = c.yellow, bold = opts.bold })
+---case,, etc.
+M.highlights.label = Highlight.new("Label", { fg = c.yellow, bold = opts.bold })
 ---"sizeof", "+", "*", etc.
-M.highlights.operator = Highlight.new("Operator", { fg = c.default.yellow, italic = opts.italic.operators })
+M.highlights.operator = Highlight.new("Operator", { fg = c.yellow, italic = opts.italic.operators })
 ---any other keyword
-M.highlights.keyword = Highlight.new("Keyword", { fg = c.default.yellow, bold = opts.bold })
+M.highlights.keyword = Highlight.new("Keyword", { fg = c.yellow, bold = opts.bold })
 ---try, catch, throw
-M.highlights.exception = Highlight.new("Exception", { fg = c.default.yellow, bold = opts.bold })
+M.highlights.exception = Highlight.new("Exception", { fg = c.yellow, bold = opts.bold })
 ---(preferred) generic Preprocessor
-M.highlights.pre_proc = Highlight.new("PreProc", { fg = c.default.quartz })
+M.highlights.pre_proc = Highlight.new("PreProc", { fg = c.quartz })
 ---preprocessor #include
-M.highlights.include = Highlight.new("Include", { fg = c.default.quartz })
+M.highlights.include = Highlight.new("Include", { fg = c.quartz })
 ---preprocessor #define
-M.highlights.define = Highlight.new("Define", { fg = c.default.quartz })
+M.highlights.define = Highlight.new("Define", { fg = c.quartz })
 ---same as Define
-M.highlights.macro = Highlight.new("Macro", { fg = c.default.quartz })
+M.highlights.macro = Highlight.new("Macro", { fg = c.quartz })
 ---preprocessor #if, #else, #endif, etc.
-M.highlights.pre_condit = Highlight.new("PreCondit", { fg = c.default.quartz })
+M.highlights.pre_condit = Highlight.new("PreCondit", { fg = c.quartz })
 ---(preferred) int, long, char, etc.
-M.highlights.type = Highlight.new("Type", { fg = c.default.quartz })
+M.highlights.type = Highlight.new("Type", { fg = c.quartz })
 ---static, register, volatile, etc.
-M.highlights.storage_class = Highlight.new("StorageClass", { fg = c.default.yellow, bold = opts.bold })
+M.highlights.storage_class = Highlight.new("StorageClass", { fg = c.yellow, bold = opts.bold })
 ---struct, union, enum, etc.
-M.highlights.structure = Highlight.new("Structure", { fg = c.default.yellow, bold = opts.bold })
+M.highlights.structure = Highlight.new("Structure", { fg = c.yellow, bold = opts.bold })
 ---A typedef
-M.highlights.typedef = Highlight.new("Typedef", { fg = c.default.yellow, bold = opts.bold })
+M.highlights.typedef = Highlight.new("Typedef", { fg = c.yellow, bold = opts.bold })
 ---(preferred) any special symbol
-M.highlights.special = Highlight.new("Special", { fg = c.default.yellow })
+M.highlights.special = Highlight.new("Special", { fg = c.yellow })
 ---SpecialChar   = Highlight.new("", { }) --- special character in a constant
 ---Tag           = Highlight.new("", { }) ---   you can use CTRL-] on this
 ---Delimiter     = Highlight.new("", { }) --- character that needs attention
 ---SpecialComment= { }, ---special things inside a comment
----Debug = Highlight.new("Debug", { fg = c.default["fg+2"] }) ---   debugging statements
+---Debug = Highlight.new("Debug", { fg = c["fg+2"] }) ---   debugging statements
 
 ---(preferred) text that stands out, HTML links
 M.highlights.underlined = Highlight.new("Underlined", { underline = opts.underline })
@@ -206,16 +204,16 @@ M.highlights.italic = Highlight.new("Italic", { italic = true })
 ---Error = Highlight.new("Error", { fg = c.error }) ---(preferred) any erroneous construct
 
 ---(preferred) anything that needs extra attention; mostly the keywords TODO FIXME and XXX
-M.highlights.todo = Highlight.new("Todo", { fg = c.default.bg, bg = c.default.yellow })
-M.highlights.md_heading_delim = Highlight.new("markdownHeadingDelimiter", { fg = c.default.niagara, bold = opts.bold })
-M.highlights.md_code = Highlight.new("markdownCode", { fg = c.default.green })
-M.highlights.md_code_block = Highlight.new("markdownCodeBlock", { fg = c.default.green })
+M.highlights.todo = Highlight.new("Todo", { fg = c.bg, bg = c.yellow })
+M.highlights.md_heading_delim = Highlight.new("markdownHeadingDelimiter", { fg = c.niagara, bold = opts.bold })
+M.highlights.md_code = Highlight.new("markdownCode", { fg = c.green })
+M.highlights.md_code_block = Highlight.new("markdownCodeBlock", { fg = c.green })
 ---markdownH1 = Highlight.new("markdownH1", { fg = c.magenta, bold = true })
 ---markdownH2 = Highlight.new("markdownH2", { fg = c.blue, bold = true })
 ---markdownLinkText = Highlight.new("markdownLinkText", { fg = c.blue, underline = true })
-M.highlights.md_italic = Highlight.new("markdownItalic", { fg = c.default.wisteria, italic = true })
-M.highlights.md_bold = Highlight.new("markdownBold", { fg = c.default.yellow, bold = opts.bold })
-M.highlights.md_code_delim = Highlight.new("markdownCodeDelimiter", { fg = c.default.brown, italic = true })
-M.highlights.md_error = Highlight.new("markdownError", { fg = c.default.fg, bg = c.default["bg+1"] })
+M.highlights.md_italic = Highlight.new("markdownItalic", { fg = c.wisteria, italic = true })
+M.highlights.md_bold = Highlight.new("markdownBold", { fg = c.yellow, bold = opts.bold })
+M.highlights.md_code_delim = Highlight.new("markdownCodeDelimiter", { fg = c.brown, italic = true })
+M.highlights.md_error = Highlight.new("markdownError", { fg = c.fg, bg = c["bg+1"] })
 
 return M