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supabase/apps/design-system/content/docs/tailwind-classes.mdx
65b962e771 design system: text color contrast (#38343)
* Refactor Drawer component and add date-fns dependency

Refactored the Drawer component for improved slot-based structure, updated styles, and added 'use client' directive. Added 'date-fns' as a dependency in design-system, updated tsconfig paths for icons, and marked ToggleGroup as a client component.

* nit: add env for svg path

* fix: instructions

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Co-authored-by: Jonathan Summers-Muir <MildTomato@users.noreply.github.com>
Co-authored-by: Joshen Lim <joshenlimek@gmail.com>
2025-09-09 11:45:08 +10:00

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---
title: Tailwind Classes
description: Theming support for Tailwind classes.
---
Supabase uses Tailwind classes that in turn use CSS properties.
This is to support the concept of theming, so that:
1. We can update themes from one place.
2. We can offer custom or additional themes in the future.
## Primitives
We define primitive color values using these tokens:
- `background`
- `foreground`
- `border`
- `brand`
- `warning`
- `destructive`
These values are exported from Figma as a .json file and transformed into Tailwind utilities through some scripts under `packages/ui/internals/tokens`.
Any of these colors are available on any Tailwind utility that accepts color. For example:
```jsx
// this uses the default foreground color for this theme
<span className="text-foreground"></span>
// this uses the 'light' foreground color for this theme (one notch 'softer' than the default)
<span className="text-foreground-light"></span>
// this uses the default warning color for this theme
<span className="text-warning"></span>
// this uses the '500' warning color
<span className="text-warning-500"></span>
```
## Shorthands
We support shorthand classes for `background`, `foreground` and `border`. For example:
- `text-muted` is the same as `text-foreground-muted`
- `bg-surface` is the same as `bg-background-surface-100`
- `border-strong` is the same as `border-border-strong`
This will stop you from needing to 'double type' the same utility name.
You might notice we use `foreground` and `background` as prefixes, this is only because it is a Design Token standard, where as Tailwind uses `bg` and `text`.
## Mixing colors
Even with shorthands, remember you can use any color. For example, `foreground-light` can also be applied on borders and backgrounds as `border-foreground-light` and `bg-foreground-light`, if needed.
Similarly, background and border primitives can be used on other Tailwind utilities.
```jsx
// use the text light color for some text
<span className="text-light"></span>
// we can use the same color for a background
<div className="bg-foreground-light">
<span>I have the same background color as the above example</span>
</div>
```
## Opacity support
All colors are generated using Tailwind opacity, like `hsl(--background-default) / var(--tw-bg-opacity)`.
This means all the color options in our themes can support opacity rules. For example:
```jsx
<div className="flex gap-3">
<div className="w-4 h-4 rounded-full bg-surface-300"></div>
<div className="w-4 h-4 rounded-full bg-surface-300/90"></div>
<div className="w-4 h-4 rounded-full bg-surface-300/80"></div>
<div className="w-4 h-4 rounded-full bg-surface-300/75"></div>
<div className="w-4 h-4 rounded-full bg-surface-300/50"></div>
</div>
```
## Usage
The following Tailwind classes are a combination of Tailwind utilities and our primitives.
Note that the shade of the `DEFAULT` value on each scale pattern is variable. Sometimes it is fixed at a particular shade (such as `500` or `600`), but only when contrast is sufficient.
### Foreground (Text)
| Value | Usage |
| ---------------------- | -------------------------------------- |
| `foreground-{DEFAULT}` | Default text (**DEFAULT** is optional) |
| `foreground-light` | Light text |
| `foreground-lighter` | Lighter text |
| `foreground-muted` | Muted text |
Examples:
```jsx
<div className="text-foreground">/div>
<div className="text-foreground-light">/div>
<div className="text-foreground-lighter">/div>
<div className="text-foreground-muted">/div>
<div className="bg-foreground-light">/div>
```
---
### Background
| Value | Usage |
| ----------------------------- | ------------------------------------------------------------ |
| `background-{DEFAULT}` | Main body background (**DEFAULT** is optional) |
| `background-surface-100` | Panels and surfaces on the same level of the main background |
| `background-surface-200` | Surfaces that overlap the main content (ex. dropdowns) |
| `background-surface-300` | Surfaces that are stacked above background-surface-200 |
| `background-alternative` | Alternative background (inverted) |
| `background-overlay` | Overlays, Dropdowns, Popovers |
| `background-control` | Inputs, Radios, Checkboxes |
| `background-button-{DEFAULT}` | Button default |
The `background` part can be omitted when used on the `bg` Tailwind utility.
Examples:
```
bg-surface-100
bg-overlay
bg-alternative
text-background-surface-100
```
---
### Border
| Value | Usage |
| ------------------------- | ---------------------------------------- |
| `border-{DEFAULT}` | Default border (**DEFAULT** is optional) |
| `border-secondary` | Secondary border |
| `border-alternative` | Alternative border (inverted) |
| `border-overlay` | Overlays, Dropdowns, Popovers |
| `border-control` | Inputs, Radios, Checkboxes |
| `border-strong` | Hover, Focus |
| `border-stronger` | Highlighted border |
| `border-button-{DEFAULT}` | Button default border |
| `border-button-hover` | Button default border hover |
Examples:
```
border-overlay
border-alternative
text-border-control
```
### Brand
| Value |
| --------- |
| `200` |
| `300` |
| `400` |
| `500` |
| `DEFAULT` |
| `600` |
| `button` |
### Destructive
| Value |
| --------- |
| `200` |
| `300` |
| `400` |
| `500` |
| `DEFAULT` |
| `600` |
### Warning
| Value |
| --------- |
| `200` |
| `300` |
| `400` |
| `500` |
| `DEFAULT` |
| `600` |