nerdcontrast.nvim

A colorscheme helper with some default based on default theme of big java IDEs.

Requirements

• Neovim 0.8.0+

Installation

lazy.nvim

return {
  'litoj/nerdcontrast.nvim',
  lazy = false,
  priority = 1000,
  opts = { -- use config = fun() to change vim.o.bg beforehand
    export = false, -- set underlying terminal's colors to the theme
    opacity = true, -- false: no bg, true: nvim bg, '00'-'ff': term opacity
    theme = {base = 'nc', override = {}}, -- default used theme, unles changed
    light = {palette = {base = 'light'}}, -- opts above, light bg specific
    dark = {palette = {base = 'dark'}}, -- opts above, dark bg specific
  }
}

Screenshots

• default nc theme

Wider usage

Theme toggle

-- Dark/Soft theme toggle
nmap('n', '<Leader>c', function()
  vim.o.bg = vim.o.bg == 'light' and 'dark' or 'light'
end)

Day/Night theme change

require'nerdcontrast'.setup { -- set your presets
  export = true,
  light = {opacity = 'ff'},
  dark = {opacity = 'cc'},
}
local t = io.popen('sunwait poll 50N 14.5E', 'r')
if t ~= nil then -- determine day or night
  vim.o.background = t:read('*l') == 'DAY' and 'light' or 'dark'
  t.close(t)
else
  local h = os.time() % 86400 / 3600 +TZ
  vim.o.background = (7 < h and h < 20) and 'light' or 'dark'
end

Highlight group customization

local nc = require 'nerdcontrast'

nc.setup { -- changes in both light and dark bg
	-- set palette/hue used by themes or add your own
  palette = {custom = {CustomColor = {bg = '#dd3388'}}}
	-- themes change what colors basic groups use
  theme = {override = {Operator = 'CustomColor'}} -- all related groups updated
}
nc.hi {
  OneBog = {fg='CustomColor', bg='Operator'}, -- both are available

  -- set hex values of given nerdcontrast custom colors
  BoldGreen = {fg = 'Green', bold = true},
  -- directly linked
  DefaultFg = 'Fg1', -- fg part of `Normal`… - Fg1,…,Fg5,Bg4,…,Bg1
  CursorBg = 'Bg2', -- BgX changes background
  -- Basic nvim groups set in `theme`, use these to be theme independent
  Error = {fg = 'Comment', bg = 'Red'}, -- specific color set in `palette`
  BgGraySpiked = {sp = 'Bg3', undercurl = true},
}
nc.setup {
  -- set overlay for NvimTree + BarBar, different for light and dark bg
  light = {theme = {override = {WinBar = 'Bg2', WinBarNC = 'Bg3'}}, opacity = 'ff'},
  dark = {theme = {override = {WinBar = 'Bg1b', WinBarNC = 'Bg2b'}}, opacity = 'cc'},
}

Plugin support

see the plugin folder and extra small adjustments

Available colors/themes

• see available palettes and themes
• or make your own and use them with directly as base tbl or path to your module

Get color codes

Get color hex with require'nerdcontrast'.palette/theme['Color name'][1] or link to them directly by name

• for bg independency, Bg/Fg<x> and other color links under nc.palette are available
  • palette colors are targeted for colorscheme creation
• for extra highlights prefer use of nc.theme groups for theme independency