---
title: Colour
context:
  lede: Always use the GOV.UK colour palette.
---

### Colour contrast

The colour contrast ratio for text and interactive elements should be at least 4.5:1 as recommended by the W3C.
Test your service to meet this standard.

### Sass variables

Use Sass variables in case colour values need to be updated.

### Extended palette

* used for graphs and supporting material
* for tints of the extended palette use 50% or 25%

Add a 'Colour' section to the docs
Add a 'Colour' section to the docs
