Writing a userstyle (walkthrough)

Beginner-friendly walkthrough of creating a userstyle!

Prerequisites
Usercss Metadata
@-moz-document
Applying the theme
The #catppuccin mixin
Putting it all together

Prerequisites

Stylus (Firefox / Chrome extension).
A website to theme!

Assuming you have completed steps 1-4 of Creating Userstyles, you should have a new catppuccin.user.less file under the styles/<name-of-website>/ directory. Follow along in that catppuccin.user.less file as we write an example userstyle for example.org.

Usercss Metadata

Start by filling out the "metadata block" at the very top of the template. Replace <port-name> with the name of the website you are porting, and please ensure it is capitalized when needed. For example.org, it looks like this:

/* ==UserStyle==
@name example.org Catppuccin
@namespace github.com/catppuccin/userstyles/styles/example.org
@homepageURL https://github.com/catppuccin/userstyles/tree/main/styles/example.org
@version 2000.01.01
@updateURL https://github.com/catppuccin/userstyles/raw/main/styles/example.org/catppuccin.user.less
@supportURL https://github.com/catppuccin/userstyles/issues?q=is%3Aopen+is%3Aissue+label%3Aexample.org
@description Soothing pastel theme for example.org
@author Catppuccin
@license MIT

@preprocessor less
@var select lightFlavor "Light Flavor" ["latte:Latte*", "frappe:Frappé", "macchiato:Macchiato", "mocha:Mocha"]
@var select darkFlavor "Dark Flavor" ["latte:Latte", "frappe:Frappé", "macchiato:Macchiato", "mocha:Mocha*"]
@var select accentColor "Accent" ["rosewater:Rosewater", "flamingo:Flamingo", "pink:Pink", "mauve:Mauve", "red:Red", "maroon:Maroon", "peach:Peach", "yellow:Yellow", "green:Green", "teal:Teal", "blue:Blue", "sapphire:Sapphire*", "sky:Sky", "lavender:Lavender", "subtext0:Gray"]
==/UserStyle== */

The rest of the metadata block details the preprocessor and the options of the userstyle. This won't need to be changed. For more information, see "Usercss Metadata" - Stylus Wiki.

`@-moz-document`

To tell Stylus which website(s) to apply this userstyle on, replace <website-domain> with the domain of your port. For example.org, it looks like this:

@-moz-document domain("example.org") {

Note

While domain() works for most cases, you may need to use regexp() for websites with more complex URLs. For example:

@-moz-document regexp("http://example.(com|net|org|edu)/") {

Applying the theme

This section of the template is about applying the user's light/dark flavors. Read the comments for this section in the template thoroughly and decide which of the two options works best for your port. example.org doesn't have a light/dark mode toggle, so we'll apply it based on the user's preferences.

:root {
  @media (prefers-color-scheme: light) {
    #catppuccin(@lightFlavor);
  }
  @media (prefers-color-scheme: dark) {
    #catppuccin(@darkFlavor);
  }
}

Tip

If example.org did use a toggle for changing the theme, we suggest using inspect element to try to observe what changes occur when the toggle is adjusted. Typically websites will have a class or attribute on the root <html> element. Some examples from our userstyles include [theme="dark"], .dark, .theme-dark, etc.

The `#catppuccin` mixin

Tip

For more on how Less mixins work, see "Mixins" - lesscss.org and "A Comprehensive Introduction to Less: Mixins" - SitePoint.

We'll refer to this next section of the template as the "#catppuccin mixin". You can ignore the first half of this section with all of the @<color>: @catppuccin[@@flavor][@<color>]; lines and skip to the comment where it says // Start styling your website here:. As the comment suggests, you will write the CSS rules for your port here. Here is what it looks like for our example.org port:

#catppuccin(@flavor) {
  @rosewater: @catppuccin[@@flavor][@rosewater];
  /* ... */
  @accent: @catppuccin[@@flavor][@@accentColor];

  color-scheme: if(@flavor = latte, light, dark);

  ::selection {
    background-color: fade(@accent, 30%);
  }

  input,
  textarea {
    &::placeholder {
      color: @subtext0 !important;
    }
  }

  body {
    background-color: @base;

    & > div {
      color: @text;
      background-color: @surface0;
    }
  }

  a:link,
  a:visited {
    color: @accent;
  }

  /* ... */
}

Putting it all together

Combining all of the previous steps, we have a working userstyle!

/* ==UserStyle==
@name example.org Catppuccin
@namespace github.com/catppuccin/userstyles/styles/example.org
@homepageURL https://github.com/catppuccin/userstyles/tree/main/styles/example.org
@version 2000.01.01
@updateURL https://github.com/catppuccin/userstyles/raw/main/styles/example.org/catppuccin.user.less
@supportURL https://github.com/catppuccin/userstyles/issues?q=is%3Aopen+is%3Aissue+label%3Aexample.org
@description Soothing pastel theme for example.org
@author Catppuccin
@license MIT

@preprocessor less
@var select lightFlavor "Light Flavor" ["latte:Latte*", "frappe:Frappé", "macchiato:Macchiato", "mocha:Mocha"]
@var select darkFlavor "Dark Flavor" ["latte:Latte", "frappe:Frappé", "macchiato:Macchiato", "mocha:Mocha*"]
@var select accentColor "Accent" ["rosewater:Rosewater", "flamingo:Flamingo", "pink:Pink", "mauve:Mauve", "red:Red", "maroon:Maroon", "peach:Peach", "yellow:Yellow", "green:Green", "teal:Teal", "blue:Blue", "sapphire:Sapphire*", "sky:Sky", "lavender:Lavender", "subtext0:Gray"]
==/UserStyle== */

@-moz-document domain("example.org") {
  :root {
    @media (prefers-color-scheme: light) {
      #catppuccin(@lightFlavor);
    }
    @media (prefers-color-scheme: dark) {
      #catppuccin(@darkFlavor);
    }
  }

  #catppuccin(@flavor) {
    @rosewater: @catppuccin[@@flavor][@rosewater];
    @flamingo: @catppuccin[@@flavor][@flamingo];
    @pink: @catppuccin[@@flavor][@pink];
    @mauve: @catppuccin[@@flavor][@mauve];
    @red: @catppuccin[@@flavor][@red];
    @maroon: @catppuccin[@@flavor][@maroon];
    @peach: @catppuccin[@@flavor][@peach];
    @yellow: @catppuccin[@@flavor][@yellow];
    @green: @catppuccin[@@flavor][@green];
    @teal: @catppuccin[@@flavor][@teal];
    @sky: @catppuccin[@@flavor][@sky];
    @sapphire: @catppuccin[@@flavor][@sapphire];
    @blue: @catppuccin[@@flavor][@blue];
    @lavender: @catppuccin[@@flavor][@lavender];
    @text: @catppuccin[@@flavor][@text];
    @subtext1: @catppuccin[@@flavor][@subtext1];
    @subtext0: @catppuccin[@@flavor][@subtext0];
    @overlay2: @catppuccin[@@flavor][@overlay2];
    @overlay1: @catppuccin[@@flavor][@overlay1];
    @overlay0: @catppuccin[@@flavor][@overlay0];
    @surface2: @catppuccin[@@flavor][@surface2];
    @surface1: @catppuccin[@@flavor][@surface1];
    @surface0: @catppuccin[@@flavor][@surface0];
    @base: @catppuccin[@@flavor][@base];
    @mantle: @catppuccin[@@flavor][@mantle];
    @crust: @catppuccin[@@flavor][@crust];
    @accent: @catppuccin[@@flavor][@@accentColor];

    color-scheme: if(@flavor = latte, light, dark);

    ::selection {
      background-color: fade(@accent, 30%);
    }

    input,
    textarea {
      &::placeholder {
        color: @subtext0 !important;
      }
    }

    body {
      background-color: @base;

      & > div {
        color: @text;
        background-color: @surface0;
      }
    }

    a:link,
    a:visited {
      color: @accent;
    }
  }
}

/* deno-fmt-ignore */
@catppuccin: {
  @latte:     { @rosewater: #dc8a78; @flamingo: #dd7878; @pink: #ea76cb; @mauve: #8839ef; @red: #d20f39; @maroon: #e64553; @peach: #fe640b; @yellow: #df8e1d; @green: #40a02b; @teal: #179299; @sky: #04a5e5; @sapphire: #209fb5; @blue: #1e66f5; @lavender: #7287fd; @text: #4c4f69; @subtext1: #5c5f77; @subtext0: #6c6f85; @overlay2: #7c7f93; @overlay1: #8c8fa1; @overlay0: #9ca0b0; @surface2: #acb0be; @surface1: #bcc0cc; @surface0: #ccd0da; @base: #eff1f5; @mantle: #e6e9ef; @crust: #dce0e8; };
  @frappe:    { @rosewater: #f2d5cf; @flamingo: #eebebe; @pink: #f4b8e4; @mauve: #ca9ee6; @red: #e78284; @maroon: #ea999c; @peach: #ef9f76; @yellow: #e5c890; @green: #a6d189; @teal: #81c8be; @sky: #99d1db; @sapphire: #85c1dc; @blue: #8caaee; @lavender: #babbf1; @text: #c6d0f5; @subtext1: #b5bfe2; @subtext0: #a5adce; @overlay2: #949cbb; @overlay1: #838ba7; @overlay0: #737994; @surface2: #626880; @surface1: #51576d; @surface0: #414559; @base: #303446; @mantle: #292c3c; @crust: #232634; };
  @macchiato: { @rosewater: #f4dbd6; @flamingo: #f0c6c6; @pink: #f5bde6; @mauve: #c6a0f6; @red: #ed8796; @maroon: #ee99a0; @peach: #f5a97f; @yellow: #eed49f; @green: #a6da95; @teal: #8bd5ca; @sky: #91d7e3; @sapphire: #7dc4e4; @blue: #8aadf4; @lavender: #b7bdf8; @text: #cad3f5; @subtext1: #b8c0e0; @subtext0: #a5adcb; @overlay2: #939ab7; @overlay1: #8087a2; @overlay0: #6e738d; @surface2: #5b6078; @surface1: #494d64; @surface0: #363a4f; @base: #24273a; @mantle: #1e2030; @crust: #181926; };
  @mocha:     { @rosewater: #f5e0dc; @flamingo: #f2cdcd; @pink: #f5c2e7; @mauve: #cba6f7; @red: #f38ba8; @maroon: #eba0ac; @peach: #fab387; @yellow: #f9e2af; @green: #a6e3a1; @teal: #94e2d5; @sky: #89dceb; @sapphire: #74c7ec; @blue: #89b4fa; @lavender: #b4befe; @text: #cdd6f4; @subtext1: #bac2de; @subtext0: #a6adc8; @overlay2: #9399b2; @overlay1: #7f849c; @overlay0: #6c7086; @surface2: #585b70; @surface1: #45475a; @surface0: #313244; @base: #1e1e2e; @mantle: #181825; @crust: #11111b; };
};

Original	Themed

Complete the rest of the steps in Userstyle Creation, and then submit your PR!

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writing-a-userstyle.md

writing-a-userstyle.md

Writing a userstyle (walkthrough)

Prerequisites

Usercss Metadata

`@-moz-document`

Applying the theme

The `#catppuccin` mixin

Putting it all together

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writing-a-userstyle.md

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writing-a-userstyle.md

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Writing a userstyle (walkthrough)

Prerequisites

Usercss Metadata

@-moz-document

Applying the theme

The #catppuccin mixin

Putting it all together

`@-moz-document`

The `#catppuccin` mixin