---
title: Typography
path: support/typography
status: Stable
status_issue: 'https://github.com/github/design-systems/issues/329'
source: 'https://github.com/primer/css/blob/master/src/support/variables/typography.scss'
bundle: support
---

## Type scale

The typography scale is designed to work for GitHub's product UI and marketing sites. Font sizes are designed to work in combination with line-height values so as to result in more sensible numbers wherever possible.

Font sizes are smaller on mobile and scale up at the `md` [breakpoint](./breakpoints) to be larger on desktop.

| Scale | Font size: mobile | Font size: desktop | 1.25 line height | 1.5 line height |
| ----- | ----------------- | ------------------ | ---------------- | --------------- |
| 00    | 40px              | 48px               | 60               | 72              |
| 0     | 32px              | 40px               | 50               | 60              |
| 1     | 26px              | 32px               | 40               | 48              |
| 2     | 22px              | 24px               | 30               | 36              |
| 3     | 18px              | 20px               | 25               | 30              |
| 4     | 16px              | 16px               | 20               | 24              |
| 5     | 14px              | 14px               | 17.5             | 21              |
| 6     | 12px              | 12px               | 15               | 18              |

The typography scale is used to create [typography utilities](/utilities/typography).

## Typography variables

### Font size variables

```scss
// Heading sizes - mobile
// h4—h6 remain the same size on both mobile & desktop
$h00-size-mobile: 40px;
$h0-size-mobile: 32px;
$h1-size-mobile: 26px;
$h2-size-mobile: 22px;
$h3-size-mobile: 18px;

// Heading sizes - desktop
$h00-size: 48px;
$h0-size: 40px;
$h1-size: 32px;
$h2-size: 24px;
$h3-size: 20px;
$h4-size: 16px;
$h5-size: 14px;
$h6-size: 12px;
```

### Font weight variables

```scss
$font-weight-bold: 600 !default;
$font-weight-light: 300 !default;
```

### Line height variables

```scss
$lh-condensed-ultra: 1 !default;
$lh-condensed: 1.25 !default;
$lh-default: 1.5 !default;
```

## Typography mixins

Typography mixins are available for heading styles and for our type scale. They can be used within components or custom CSS. The same styles are also available as [utilities](/utilities/typography#heading-utilities). which requires no additional CSS.

Heading mixins are available for `h1` through to `h6`, this includes the font-size and font-weight. Example:

```scss
.styles {
  @include h1;
}
```

Responsive heading mixins can be used to adjust the font-size between the `sm` and `lg` breakpoint. Only headings 1—3 are responsive. Heading 4—6 are small enough to remain the same between mobile and desktop. Responsive heading mixins include the font-size and font-weight as well as the media query. To use a responsive heading mixin, postfix the heading with `-responsive`:

```scss
.styles {
  @include h1-responsive;
}
```

Responsive type scale mixins are also available. Type scale mixins apply a font-size that gets slightly bigger at the `lg` breakpoint. They do not apply a font-weight. Like the responsive heading mixins, they are only available for size `f1` to `f3` and are postfixed with `-responsive` as in the example below:

```scss
.style {
  @include f1-responsive;
}
```