feat(terminal): bright ansi colors (#648)

## Description

<!-- Describe the big picture of your changes to communicate to the
maintainers
  why we should accept this pull request. -->
Generate bright ansi colors based on the ansi colors.

lua/tokyonight/colors/init.lua

@@ -67,6 +67,27 @@ function M.setup(opts)
 
   colors.rainbow = { colors.blue, colors.yellow, colors.green, colors.teal, colors.magenta, colors.purple }
 
+  -- stylua: ignore
+  --- @class TerminalColors
+  colors.terminal = {
+    black          = colors.black,
+    black_bright   = colors.terminal_black,
+    red            = colors.red,
+    red_bright     = Util.brighten(colors.red),
+    green          = colors.green,
+    green_bright   = Util.brighten(colors.green),
+    yellow         = colors.yellow,
+    yellow_bright  = Util.brighten(colors.yellow),
+    blue           = colors.blue,
+    blue_bright    = Util.brighten(colors.blue),
+    magenta        = colors.magenta,
+    magenta_bright = Util.brighten(colors.magenta),
+    cyan           = colors.cyan,
+    cyan_bright    = Util.brighten(colors.cyan),
+    white          = colors.fg_dark,
+    white_bright   = colors.fg,
+  }
+
   opts.on_colors(colors)
 
   return colors, opts

lua/tokyonight/extra/kitty.lua

@@ -34,24 +34,24 @@ active_border_color ${blue}
 inactive_border_color ${bg_highlight}
 
 # normal
-color0 ${black}
-color1 ${red}
-color2 ${green}
-color3 ${yellow}
-color4 ${blue}
-color5 ${magenta}
-color6 ${cyan}
-color7 ${fg_dark}
+color0 ${terminal.black}
+color1 ${terminal.red}
+color2 ${terminal.green}
+color3 ${terminal.yellow}
+color4 ${terminal.blue}
+color5 ${terminal.magenta}
+color6 ${terminal.cyan}
+color7 ${terminal.white}
 
 # bright
-color8 ${terminal_black}
-color9 ${red}
-color10 ${green}
-color11 ${yellow}
-color12 ${blue}
-color13 ${magenta}
-color14 ${cyan}
-color15 ${fg}
+color8  ${terminal.black_bright}
+color9  ${terminal.red_bright}
+color10 ${terminal.green_bright}
+color11 ${terminal.yellow_bright}
+color12 ${terminal.blue_bright}
+color13 ${terminal.magenta_bright}
+color14 ${terminal.cyan_bright}
+color15 ${terminal.white_bright}
 
 # extended colors
 color16 ${orange}

lua/tokyonight/extra/wezterm.lua

@@ -18,8 +18,8 @@ split = "${blue}"
 compose_cursor = "${orange}"
 scrollbar_thumb = "${bg_highlight}"
 
-ansi = ["${black}", "${red}", "${green}", "${yellow}", "${blue}", "${magenta}", "${cyan}", "${fg_dark}"]
-brights = ["${terminal_black}", "${red}", "${green}", "${yellow}", "${blue}", "${magenta}", "${cyan}", "${fg}"]
+ansi = ["${terminal.black}", "${terminal.red}", "${terminal.green}", "${terminal.yellow}", "${terminal.blue}", "${terminal.magenta}", "${terminal.cyan}", "${terminal.white}"]
+brights = ["${terminal.black_bright}", "${terminal.red_bright}", "${terminal.green_bright}", "${terminal.yellow_bright}", "${terminal.blue_bright}", "${terminal.magenta_bright}", "${terminal.cyan_bright}", "${terminal.white_bright}"]
 
 [colors.tab_bar]
 inactive_tab_edge = "${bg_dark}"

lua/tokyonight/theme.lua

@@ -32,31 +32,31 @@ end
 ---@param colors ColorScheme
 function M.terminal(colors)
   -- dark
-  vim.g.terminal_color_0 = colors.black
-  vim.g.terminal_color_8 = colors.terminal_black
+  vim.g.terminal_color_0 = colors.terminal.black
+  vim.g.terminal_color_8 = colors.terminal.black_bright
 
   -- light
-  vim.g.terminal_color_7 = colors.fg_dark
-  vim.g.terminal_color_15 = colors.fg
+  vim.g.terminal_color_7 = colors.terminal.white
+  vim.g.terminal_color_15 = colors.terminal.white_bright
 
   -- colors
-  vim.g.terminal_color_1 = colors.red
-  vim.g.terminal_color_9 = Util.blend_fg(colors.red, 0.5)
+  vim.g.terminal_color_1 = colors.terminal.red
+  vim.g.terminal_color_9 = colors.terminal.red_bright
 
-  vim.g.terminal_color_2 = colors.green
-  vim.g.terminal_color_10 = Util.blend_fg(colors.green, 0.5)
+  vim.g.terminal_color_2 = colors.terminal.green
+  vim.g.terminal_color_10 = colors.terminal.green_bright
 
-  vim.g.terminal_color_3 = colors.yellow
-  vim.g.terminal_color_11 = Util.blend_fg(colors.yellow, 0.5)
+  vim.g.terminal_color_3 = colors.terminal.yellow
+  vim.g.terminal_color_11 = colors.terminal.yellow_bright
 
-  vim.g.terminal_color_4 = colors.blue
-  vim.g.terminal_color_12 = Util.blend_fg(colors.blue, 0.5)
+  vim.g.terminal_color_4 = colors.terminal.blue
+  vim.g.terminal_color_12 = colors.terminal.blue_bright
 
-  vim.g.terminal_color_5 = colors.magenta
-  vim.g.terminal_color_13 = Util.blend_fg(colors.magenta, 0.5)
+  vim.g.terminal_color_5 = colors.terminal.magenta
+  vim.g.terminal_color_13 = colors.terminal.magenta_bright
 
-  vim.g.terminal_color_6 = colors.cyan
-  vim.g.terminal_color_14 = Util.blend_fg(colors.cyan, 0.5)
+  vim.g.terminal_color_6 = colors.terminal.cyan
+  vim.g.terminal_color_14 = colors.terminal.cyan_bright
 end
 
 return M

lua/tokyonight/util.lua

@@ -70,6 +70,27 @@ function M.invert(color)
   return color
 end
 
+---@param color string  -- The hex color string to be adjusted
+---@param lightness_amount number? -- The amount to increase lightness by (optional, default: 0.1)
+---@param saturation_amount number? -- The amount to increase saturation by (optional, default: 0.15)
+function M.brighten(color, lightness_amount, saturation_amount)
+  lightness_amount = lightness_amount or 0.05
+  saturation_amount = saturation_amount or 0.2
+  local hsluv = require("tokyonight.hsluv")
+
+  -- Convert the hex color to HSLuv
+  local hsl = hsluv.hex_to_hsluv(color)
+
+  -- Increase lightness slightly
+  hsl[3] = math.min(hsl[3] + (lightness_amount * 100), 100)
+
+  -- Increase saturation a bit more to make the color more vivid
+  hsl[2] = math.min(hsl[2] + (saturation_amount * 100), 100)
+
+  -- Convert the HSLuv back to hex and return
+  return hsluv.hsluv_to_hex(hsl)
+end
+
 ---@param groups tokyonight.Highlights
 ---@return table<string, vim.api.keyset.highlight>
 function M.resolve(groups)