Trouble with Browser Fallbacks

Tell us what’s happening:

Hi! I’m having trouble remembering how to create fallback values. I have to declare it before the existing background declaration? Can anyone help jog my memory?

“Your .red-box rule should include a fallback with the background set to red immediately before the existing background declaration.”

Your code so far

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

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36.

Link to the challenge:

To give a fallback value, simply give background color of red in the previous line (empty line).