diff --git a/README.md b/README.md
index 4e59bb1..3435d58 100644
--- a/README.md
+++ b/README.md
@@ -108,7 +108,7 @@ The **day** style will be used if:
 + or `vim.o.background == "light"`
 
 | Option                              | Default   | Description                                                                                                                                                     |
-| ----------------------------------- | --------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+|-------------------------------------|-----------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | tokyonight_style                    | `"storm"` | The theme comes in three styles, `storm`, a darker variant `night` and `day`.                                                                                   |
 | tokyonight_terminal_colors          | `true`    | Configure the colors used when opening a `:terminal` in Neovim                                                                                                  |
 | tokyonight_italic_comments          | `true`    | Make comments italic                                                                                                                                            |
@@ -121,6 +121,7 @@ The **day** style will be used if:
 | tokyonight_dark_sidebar             | `true`    | Sidebar like windows like `NvimTree` get a darker background                                                                                                    |
 | tokyonight_dark_float               | `true`    | Float windows like the lsp diagnostics windows get a darker background.                                                                                         |
 | tokyonight_colors                   | `{}`      | You can override specific color groups to use other groups or a hex color                                                                                       |
+| tokyonight_day_brightness           | `0.3`     | Adjusts the brightness of the colors of the **Day** style. Number between 0 and 1, from dull to vibrant colors                                                  |
 
 ```lua
 -- Example config in Lua
diff --git a/lua/tokyonight/colors.lua b/lua/tokyonight/colors.lua
index b607645..79521b3 100644
--- a/lua/tokyonight/colors.lua
+++ b/lua/tokyonight/colors.lua
@@ -48,6 +48,7 @@ function M.setup(config)
     colors.bg = "#1a1b26"
   end
   util.bg = colors.bg
+  util.day_brightness = config.dayBrightness
 
   colors.diff = {
     add = util.darken(colors.green2, 0.15),
diff --git a/lua/tokyonight/config.lua b/lua/tokyonight/config.lua
index d678971..4d027ba 100644
--- a/lua/tokyonight/config.lua
+++ b/lua/tokyonight/config.lua
@@ -17,6 +17,7 @@ end
 
 config = {
   style = opt("style", "storm"),
+  dayBrightness = opt("day_brightness", 0.3),
   transparent = opt("transparent", false),
   commentStyle = opt("italic_comments", true) and "italic" or "NONE",
   keywordStyle = opt("italic_keywords", true) and "italic" or "NONE",
diff --git a/lua/tokyonight/util.lua b/lua/tokyonight/util.lua
index 7dbf42a..f174d83 100644
--- a/lua/tokyonight/util.lua
+++ b/lua/tokyonight/util.lua
@@ -7,6 +7,7 @@ util.colorCache = {}
 
 util.bg = "#000000"
 util.fg = "#ffffff"
+util.day_brightness = 0.3
 
 local function hexToRgb(hex_str)
   local hex = "[abcdef0-9][abcdef0-9]"
@@ -56,7 +57,7 @@ function util.invertColor(color)
     local hsl = hsluv.hex_to_hsluv(color)
     hsl[3] = 100 - hsl[3]
     if hsl[3] < 40 then
-      hsl[3] = hsl[3] + (100 - hsl[3]) * 0.3
+      hsl[3] = hsl[3] + (100 - hsl[3]) * util.day_brightness
     end
     return hsluv.hsluv_to_hex(hsl)
   end