---
id: 5d822fd413a79914d39e98e0
title: Part 24
challengeType: 0
---
## Description
Create a new variable by the other ones named `--building-color3` and give it a value of `#cc6699`. Then use it as the `background-color` of the `bb3` class and give it a fallback value of `pink`.
## Instructions
## Tests
```yml
tests:
- text: test-text
testString: const bb1style = code.match(/\.bb1\s*{[\s\S]+?[^}]}/g)[0]; const bb3style = code.match(/\.bb3\s*{[\s\S]+?[^}]}/g)[0];assert(/--building-color3\s*:\s*#cc6699\s*(;|\s*})/g.test(bb1style) && /background-color\s*:\s*var\(\s*--building-color3\s*,\s*pink\s*\)\s*(;|\s*})/g.test(bb3style));
```
## Challenge Seed
```html
freeCodeCamp Skyline Project
```