CSS. beginner class

Tell us what’s happening:

How to Improve Compatibility with Browser Fallbacks

Your code so far

:root {
  --red-color: red;
.red-box {
  color: red;

  background: var(--red-color);
  height: 200px;
<div class="red-box"></div>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.89 Safari/537.36.

Challenge: Improve Compatibility with Browser Fallbacks

Link to the challenge:

.red-box should start with given code below.

background: red;
background: var(--red-color);

The challenge is explaining to you how you can provide a fall back background-color so that a browser which doesn’t support CSS variables will still be able to style your HTML with the fall back colour - you just need to follow the instruction.