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Add custom fonts to the Developer portal

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Looking for Realm documentation? These documentation are for our old developer portal. Realm users should contact their account manager for details of the early access documentation.

You can use custom fonts in your developer portal to customize its appearance. To add custom fonts to your portal theme settings, you must first define them in a special stylesheet (CSS) file in your portal project.

Custom fonts are supported in the Developer portal regardless of how you're hosting it (on-premise or in Workflows).

Copy font files to your portal project

  1. In the root of your portal project, create a folder called static, or if it already exists, navigate to it. This is a special folder for organizing various portal assets.

  2. In the static folder, create a subfolder called fonts and place your custom font files into it.

Define custom fonts in a stylesheet

  1. In the static folder, create a file called fonts.css. You can use a different name for this file, but its extension must be .css.

  2. In the fonts.css file you've created, define one or more custom fonts you want to use in the portal. The following examples show how to define a custom font family with three different file formats:

@font-face {
  font-family: 'your-font-name', monospace;
  src: url(fonts/your-font.woff2) format('woff2'),
       url(fonts/your-font2.woff) format('woff'),
       url(fonts/your-font3.ttf) format('truetype');

The contents of the url() field must match the location of your font file. Make sure the font file type matches the contents of the format() field.

  1. Save the changes to the fonts.css file.

Add the stylesheet to portal configuration

  1. Open the siteConfig.yaml file for your portal project.

  2. In the stylesheets section, add the path to the custom font stylesheet you've created.

  - './static/fonts.css'
  1. Save the changes to the siteConfig.yaml file.

Use custom fonts in the portal theme

After you have copied the font files to your portal project and set up the font stylesheet, you can use custom fonts in the theme.ts file.

When specifying the font name in the theme.ts file, make sure it matches the your-font-name from the fonts.css file.

The following example shows how to use a custom font in the typography section of the portal theme:

typography: {
  fontSize: '16px',
  lineHeight: '1.5em',
  fontWeightRegular: '400',
  fontWeightBold: '600',
  fontWeightLight: '300',
  fontFamily: '"your-font-name", monospace',
  headings: {
    fontFamily: '"your-font-name", monospace',
    fontWeight: '600',

Note that you must rebuild the portal for your changes to apply.