---
id: 5d822fd413a79914d39e98f5
title: Part 45
challengeType: 0
isBeta: true
---
## Description
It's a little hidden behind the foreground buildings, but you can see the three color gradient there. Since you are using that now, remove the `background-color` property from `bb1d`.
## Instructions
## Tests
```yml
tests:
- text: test-text
testString: const bb1dStyle = code.match(/\.bb1d\s*{[\s\S]+?[^}]}/g)[0]; assert(!/background-color/g.test(bb1dStyle));
```
## Challenge Seed
```html
freeCodeCamp Skyline Project
```