Brand your website with your colors and captivate your audience.

Shibuya supports a wide range of customizations to colors via CSS variables. By using CSS variables, you can easily modify the colors used in your documentation without needing to manually edit CSS files.

Dark code

By default, code blocks in light theme will be decorated with a light background. But it is possible to use the dark code mode in the light mode. To turn all code blocks into dark mode, you can update dark_code in html_theme_options:

html_theme_options = {
    "dark_code": True,

There is also a page level configuration via :dark_code: meta tag. If you don’t want to enable it for the whole site, you can use the meta tag.

Theme color

Shibuya theme comes with a default theme color of purple, which is defined with CSS variable of --sy-rc-theme. You can update the theme color in
html_theme_options = {
    "light_css_variables": {
      "--sy-rc-theme": "143, 118, 214",
    "dark_css_variables": {
      "--sy-rc-theme": "130, 80, 223",


Theme color is defined in RGB mode.

Variable name conventions

Our naming conventions for Shibuya theme-related CSS variables are as follows:

  • Prefix: All Shibuya-related CSS variable names start with --sy. This prefix stands for Shibuya.

  • Middle: After the prefix, the CSS variable name should include a dash followed by one or more of the following segments:

    • -c: This segment indicates that the CSS variable is used for color.

    • -rc: This segment indicates that the CSS variable is used for RGB color.

    • -s: This segment indicates that the CSS variable is used for size.

    • -f: This segment indicates that the CSS variable is used for font.

  • Specificity: After the segments, the CSS variable name should describe the specific use of the variable. For example, --sy-c-link refers to the color of a link in your documentation.

By following these naming conventions, you can easily identify and customize the CSS variables for your Shibuya-themed documentation.

Available CSS Variables

Below is a list of CSS variables that you can customize to change the colors used in your documentation:

Variable Name



System font stack


CJK font stack


Font stack for headings


Font stack for body text


Monospace font stack


Divider color


Weak divider color


Border color


Height of the banner


Height of the navbar


Top offset


Color for links


Theme color in RGB


Background color in RGB


Inverted color in RGB


Text color in RGB


Background color for elements


Weak background color for elements


Default text color


Weak text color


Heading text color


Bold text color


Footer text color


Footer background color


Footer divider color

Using a custom.css

Besides the light_css_variables and dark_css_variables in html_theme_options, you can also add a custom.css file to your document repository, and use CSS variables to define the colors you want to use.

Create a new file called custom.css in the _static directory of your documentation project, and add it into with:

html_css_files = [

This will tell Sphinx to include your custom.css file in the HTML output of your documentation.

Once you have created the custom.css file and updated it in, you can use CSS variables to define your desired colors. Here is an example of how to set the --sy-rc-theme variable to a red RGB color:

html.light {
  --sy-rc-theme: 245, 85, 153;

html.dark {
  --sy-rc-theme: 222, 114, 160;

The CSS variables defined in the html.light block will be activated in the light mode, while the variables defined in the html.dark block will be activated in the dark mode.

Additional CSS Variables

In addition to the CSS variables listed in the previous section, you can also customize other variables that are not specific to the Shibuya theme but are used by Shibuya theme or any other extensions.

One such variable is --yue-c-text, which sets the color of the text in the your document content. You can customize this variable in custom.css:

html.light {
  --yue-c-text: #000;

html.dark {
  --yue-c-text: #fff;


Discover all available CSS variables by using the inspect feature in your web browser.