---
id: 5d822fd413a79914d39e993d
title: Part 119
challengeType: 0
isHidden: true
---
## Description
Add a `:root` selector to the top of your media query. Then redefine all four of the `--building-color` variables to use the value `#000` there.
## Instructions
## Tests
```yml
tests:
- text: test-text
testString: const root = code.match(/:root\s*{[\s\S]+?[^}]}/g)[1]; assert(/--building-color1\s*:\s*#000\s*(;|})/g.test(root) && /--building-color2\s*:\s*#000\s*(;|})/g.test(root) && /--building-color3\s*:\s*#000\s*(;|})/g.test(root) && /--building-color4\s*:\s*#000\s*(;|})/g.test(root));
```
## Challenge Seed
```html
freeCodeCamp Skyline Project
```