---
id: 5d822fd413a79914d39e98e3
title: Part 27
challengeType: 0
dashedName: part-27
---
# --description--
Create another variable named `--building-color4` and give it a value of `#538cc6`. Make sure it's in the `:root` selector this time. Then use it to fill in the last building.
# --hints--
You should define a new property variable called `--building-color4`.
```js
assert.exists(new __helpers.CSSHelp(document).isPropertyUsed('--building-color4'));
```
You should give `--building-color4` a value of `#538cc6` in the `:root` selector.
```js
assert.equal(new __helpers.CSSHelp(document).getStyle(':root')?.getPropertyValue('--building-color4').trim(), '#538cc6');
```
# --seed--
## --seed-contents--
```html