Better Default Neovim Theme

default-improved.lua

local theme = {
  fg         = vim.o.background == 'dark' and 'NvimLightGrey2' or 'NvimDarkGrey2',
  fg_dim     = vim.o.background == 'dark' and 'NvimLightGrey3' or 'NvimDarkGrey3',
  nontext    = vim.o.background == 'dark' and 'NvimLightGrey4' or 'NvimDarkGrey4',
  bg         = vim.o.background == 'dark' and 'NvimDarkGrey2' or 'NvimLightGrey2',

  variable   = vim.o.background == 'dark' and 'NvimLightGrey2' or 'NvimDarkGrey2',

  number     = vim.o.background == 'dark' and 'NvimLightMagenta' or 'NvimDarkMagenta',
  string     = vim.o.background == 'dark' and 'NvimLightGreen' or 'NvimDarkGreen',
  identifier = vim.o.background == 'dark' and 'NvimLightYellow' or 'NvimDarkYellow',
  fun        = vim.o.background == 'dark' and 'NvimLightCyan' or 'NvimDarkCyan',
  keyword    = vim.o.background == 'dark' and 'NvimLightBlue' or 'NvimDarkBlue',
  type       = vim.o.background == 'dark' and 'NvimLightCyan' or 'NvimDarkCyan',
  constant   = vim.o.background == 'dark' and 'NvimLightMagenta' or 'NvimDarkMagenta',
  special    = vim.o.background == 'dark' and 'NvimLightBlue' or 'NvimDarkBlue',

  selection  = vim.o.background == 'dark' and 'NvimDarkBlue' or 'NvimLightBlue',

  highlight  = vim.o.background == 'dark' and 'NvimLightGrey1' or 'NvimDarkGrey1',

  add        = vim.o.background == 'dark' and 'NvimLightGreen' or 'NvimDarkGreen',
  delete     = vim.o.background == 'dark' and 'NvimLightRed' or 'NvimDarkRed',
  change     = vim.o.background == 'dark' and 'NvimLightYellow' or 'NvimDarkYellow',

  add_bg     = vim.o.background == 'dark' and 'NvimDarkGreen' or 'NvimLightGreen',
  delete_bg  = vim.o.background == 'dark' and 'NvimDarkRed' or 'NvimLightRed',
  change_bg  = vim.o.background == 'dark' and 'NvimDarkYellow' or 'NvimLightYellow',
  text_bg    = vim.o.background == 'dark' and 'NvimDarkBlue' or 'NvimLightBlue',

  ok         = vim.o.background == 'dark' and 'NvimLightGreen' or 'NvimDarkGreen',
  error      = vim.o.background == 'dark' and 'NvimLightRed' or 'NvimDarkRed',
  warning    = vim.o.background == 'dark' and 'NvimLightYellow' or 'NvimDarkYellow',
  info       = vim.o.background == 'dark' and 'NvimLightBlue' or 'NvimDarkBlue',
  hint       = vim.o.background == 'dark' and 'NvimLightCyan' or 'NvimDarkCyan',
}

-- Base
vim.api.nvim_set_hl(0, "Normal", { fg = theme.fg, bg = theme.bg })
vim.api.nvim_set_hl(0, "Secondary", { fg = theme.fg_dim })
vim.api.nvim_set_hl(0, "NonText", { fg = theme.nontext })
vim.api.nvim_set_hl(0, "HighlightText", { fg = theme.highlight, bold = true })
vim.api.nvim_set_hl(0, "Special", { fg = theme.special })
vim.api.nvim_set_hl(0, "Bold", { bold = true })

-- Hidden
vim.api.nvim_set_hl(0, "Hidden", { bg = theme.bg })
vim.api.nvim_set_hl(0, "HiddenText", { fg = theme.bg })

-- Search and Selection
vim.api.nvim_set_hl(0, "Visual", { bg = theme.selection })
vim.api.nvim_set_hl(0, "Cursor", { fg = 'none', bg = theme.fg })
vim.api.nvim_set_hl(0, "Search", { fg = theme.fg, bg = theme.selection })
vim.api.nvim_set_hl(0, "CurSearch", { fg = theme.bg, bg = theme.info })
vim.api.nvim_set_hl(0, "Substitute", { fg = theme.fg, bg = theme.change })

-- Coding
vim.api.nvim_set_hl(0, "Function", { fg = theme.fun })
vim.api.nvim_set_hl(0, "Identifier", { fg = theme.identifier })
vim.api.nvim_set_hl(0, "Keyword", { fg = theme.keyword })
vim.api.nvim_set_hl(0, "Variable", { fg = theme.variable })
vim.api.nvim_set_hl(0, "Comment", { fg = theme.nontext, italic = true })
vim.api.nvim_set_hl(0, "Constant", { fg = theme.constant })
vim.api.nvim_set_hl(0, "String", { fg = theme.string })
vim.api.nvim_set_hl(0, "Number", { fg = theme.number })
vim.api.nvim_set_hl(0, "Statement", { fg = theme.special })
vim.api.nvim_set_hl(0, "Type", { fg = theme.type })

-- Message Context
vim.api.nvim_set_hl(0, "Error", { fg = theme.error })
vim.api.nvim_set_hl(0, "Info", { fg = theme.info })
vim.api.nvim_set_hl(0, "Warn", { fg = theme.warning })
vim.api.nvim_set_hl(0, "Hint", { fg = theme.hint })
vim.api.nvim_set_hl(0, "Ok", { fg = theme.ok })
vim.api.nvim_set_hl(0, "UnderlineError", { undercurl = true, sp = theme.error })
vim.api.nvim_set_hl(0, "UnderlineWarn", { undercurl = true, sp = theme.warning })
vim.api.nvim_set_hl(0, "UnderlineInfo", { undercurl = true, sp = theme.info })
vim.api.nvim_set_hl(0, "UnderlineHint", { undercurl = true, sp = theme.hint })

-- Diff
vim.api.nvim_set_hl(0, "Added", { fg = theme.add })
vim.api.nvim_set_hl(0, "Removed", { fg = theme.delete })
vim.api.nvim_set_hl(0, "Changed", { fg = theme.change })
vim.api.nvim_set_hl(0, "AddStaged", { fg = theme.add, bold = true })
vim.api.nvim_set_hl(0, "RemoveStaged", { fg = theme.delete, bold = true })
vim.api.nvim_set_hl(0, "ChangeStaged", { fg = theme.change, bold = true })
vim.api.nvim_set_hl(0, "DiffAdd", { bg = theme.add_bg })
vim.api.nvim_set_hl(0, "DiffChange", { bg = theme.change_bg })
vim.api.nvim_set_hl(0, "DiffDelete", { bg = theme.delete_bg })
vim.api.nvim_set_hl(0, "DiffText", { bg = theme.text_bg })

-- Other Linked
vim.api.nvim_set_hl(0, "Operator", { link = "Keyword" })
vim.api.nvim_set_hl(0, "Whitespace", { link = "NonText" })
vim.api.nvim_set_hl(0, "Delimiter", { link = "NonText" })
vim.api.nvim_set_hl(0, "PreProc", { link = "Keyword" })
vim.api.nvim_set_hl(0, "Ignore", { link = "NonText" })
vim.api.nvim_set_hl(0, "QuickFixLine", { link = "lineNr" })
vim.api.nvim_set_hl(0, "qfFileName", { link = "Directory" })
vim.api.nvim_set_hl(0, "SpecialKey", { link = "Special" })
vim.api.nvim_set_hl(0, "Conceal", { link = "NonText" })
vim.api.nvim_set_hl(0, "Directory", { link = "Keyword" })

-- Messages
vim.api.nvim_set_hl(0, "MsgArea", { link = 'StatusLine' })
vim.api.nvim_set_hl(0, "ModeMsg", { link = "NonText" })
vim.api.nvim_set_hl(0, "MoreMsg", { link = "Info" })
vim.api.nvim_set_hl(0, "Question", { link = "Info" })
vim.api.nvim_set_hl(0, "ErrorMsg", { link = "Error" })
vim.api.nvim_set_hl(0, "WarningMsg", { link = "Warn" })

-- UI
vim.api.nvim_set_hl(0, "lCursor", { link = "Cursor" })
-- vim.api.nvim_set_hl(0, "CursorLine", { link = "Hidden" })
-- vim.api.nvim_set_hl(0, "CursorLineNr", { link = "HighlightText" })
vim.api.nvim_set_hl(0, "EndOfBuffer", { link = "HiddenText" })
vim.api.nvim_set_hl(0, "Folded", { link = "HighlightText" })
vim.api.nvim_set_hl(0, "FoldColumn", { link = "NonText" })
vim.api.nvim_set_hl(0, "LineNr", { link = "Secondary" })
vim.api.nvim_set_hl(0, "MatchParen", { link = "HighlightText" })
vim.api.nvim_set_hl(0, "SignColumn", { link = "Keyword" })
vim.api.nvim_set_hl(0, "StatusLine", { link = "Secondary" })
vim.api.nvim_set_hl(0, "StatusLineNC", { link = "NonText" })
vim.api.nvim_set_hl(0, "Title", { link = "HighlightText" })
vim.api.nvim_set_hl(0, "WinSeparator", { link = "NonText" })
vim.api.nvim_set_hl(0, "WinBar", { link = "Secondary" })
vim.api.nvim_set_hl(0, "WinBarNC", { link = "NonText" })

-- Floats & Menus
vim.api.nvim_set_hl(0, "FloatBorder", { link = "NonText" })
vim.api.nvim_set_hl(0, "FloatTitle", { link = "NonText" })
vim.api.nvim_set_hl(0, "FloatFooter", { link = "NonText" })
vim.api.nvim_set_hl(0, "NormalFloat", { link = 'Normal' })
vim.api.nvim_set_hl(0, "Pmenu", { link = 'NormalFloat' })
vim.api.nvim_set_hl(0, "PmenuSel", { link = "Visual" })
vim.api.nvim_set_hl(0, "PmenuSbar", { link = "NonText" })
vim.api.nvim_set_hl(0, "PmenuThumb", { link = "NonText" })

-- Spell Check
vim.api.nvim_set_hl(0, "SpellBad", { link = "UnderlineError" })
vim.api.nvim_set_hl(0, "SpellCap", { link = "UnderlineWarn" })
vim.api.nvim_set_hl(0, "SpellLocal", { link = "UnderlineWarn" })
vim.api.nvim_set_hl(0, "SpellRare", { link = "UnderlineWarn" })

-- Diagnostics
vim.api.nvim_set_hl(0, "DiagnosticError", { link = "Error" })
vim.api.nvim_set_hl(0, "DiagnosticWarn", { link = "Warn" })
vim.api.nvim_set_hl(0, "DiagnosticInfo", { link = "Info" })
vim.api.nvim_set_hl(0, "DiagnosticHint", { link = "Hint" })
vim.api.nvim_set_hl(0, "DiagnosticOk", { link = "Ok" })
vim.api.nvim_set_hl(0, "DiagnosticUnderlineError", { link = "UnderlineError" })
vim.api.nvim_set_hl(0, "DiagnosticUnderlineWarn", { link = "UnderlineWarn" })
vim.api.nvim_set_hl(0, "DiagnosticUnderlineInfo", { link = "UnderlineInfo" })
vim.api.nvim_set_hl(0, "DiagnosticUnderlineHint", { link = "UnderlineHint" })

-- LSP
vim.api.nvim_set_hl(0, "@variable", { link = "Variable" })
vim.api.nvim_set_hl(0, "@variable.member", { link = "Identifier" })
vim.api.nvim_set_hl(0, "@constructor.lua", { link = "NonText" })
vim.api.nvim_set_hl(0, "@lsp.type.variable", { fg = "none" })
vim.api.nvim_set_hl(0, "@lsp.typemod.variable.global", { link = "Constant" })
vim.api.nvim_set_hl(0, "@lsp.typemod.variable.static", { link = "Constant" })