---
id: 5d822fd413a79914d39e9914
title: Part 76
challengeType: 0
isBeta: true
---
## Description
Move the `background-color` property and value from `fb1` to `fb1b`.
## Instructions
## Tests
```yml
tests:
- text: test-text
testString: const fb1b = code.match(/\.fb1b\s*{[\s\S]+?[^}]}/g)[0]; assert(/background-color\s*:\s*var\(\s*--building-color4\s*\)\s*(;|})/g.test(fb1b));
```
## Challenge Seed
```html
freeCodeCamp Skyline Project
```