Improve Compatibility with Browser Fallbacks - my answer appears correct

Tell us what’s happening:
There seems to be a bug in this question. This code should pass, but it’s not. It doesn’t let me go with “background-color: red;” either. Anyone know how I can contact the administrators to let them know?

Your code so far


<style>
  :root {
    --red-color: red;
  }
  .red-box {
    background: red;
    background: var(--red-color, red);
    height: 200px;
    width:200px;
  }
</style>
<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/70.0.3538.110 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/responsive-web-design/basic-css/improve-compatibility-with-browser-fallbacks

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

Inside of the second background rule, try just having the variable name rather than var(–red-color, red). The background: red; that comes before it will be the fallback if var names are not supported.

:root {
–red-color: red;
}
.red-box {
background: red;
background: var(–red-color);
height: 200px;
width:200px;
}
==> when i read the text of FCC, i think we need to declare a default background is red. I’ve pass through with this