Help Improve Compatibility with Browser Fallbacks

Tell us what’s happening:

It looks like a variable is being used to set the background color of the .red-box class. Let’s improve our browser compatibility by adding another background declaration right before the existing declaration and set its value to red. i could not get it right

Your code so far

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

Read the instructions again. They say;

What declaration did you set to red? What declaration did the instructions say to set to red?
And another hint, the red that you set does NOT need to be in parens.