How do i fins this please?

Tell us what’s happening:
how can i fix this please?

Your code so far

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

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1 Safari/605.1.15.

Link to the challenge:

You need a fallback value on the line before where current --red-color is used.

Give a regular red color to your background so that its value can be used in case if --red-color value is not used.