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nvim/lua/catppuccin/utils/colors.lua

40 lines
946 B
Lua

local M = {}
local function color_is_bright(r, g, b)
-- Counting the perceptive luminance - human eye favors green color
local luminance = (0.299 * r + 0.587 * g + 0.114 * b) / 255
if luminance > 0.5 then
return true -- Bright colors, black font
else
return false -- Dark colors, text font
end
end
function M.hex2rgb(hex)
return tonumber("0x" .. hex:sub(1, 2)), tonumber("0x" .. hex:sub(3, 4)), tonumber("0x" .. hex:sub(5, 6))
end
function M.assert_brightness(color)
local hex = color:gsub("#", "")
local r = M.hex2rgb(string.sub(hex, 1, 2))
local g = M.hex2rgb(string.sub(hex, 3, 4))
local b = M.hex2rgb(string.sub(hex, 5, 6))
if color_is_bright(tonumber(r), tonumber(g), tonumber(b)) == true then
return true -- bright
end
return false -- dull
end
function M.vary_color(palettes, default)
local flvr = vim.g.catppuccin_flavour
if palettes[flvr] ~= nil then
return palettes[flvr]
end
return default
end
return M