---
id: 5d822fd413a79914d39e98ef
title: Part 39
challengeType: 0
dashedName: part-39
---
# --description--
Create a new variable in `:root` called `--window-color1` and give it a value of `black`. This will be a secondary color for the purple buildings.
# --hints--
test-text
```js
const rootStyle = code.match(/:root\s*{[\s\S]+?[^}]}/g)[0];
assert(/--window-color1\s*:\s*black\s*(;|})/g.test(rootStyle));
```
# --seed--
## --seed-contents--
```html
freeCodeCamp Skyline Project
```
# --solutions--
```html
freeCodeCamp Skyline Project
```