Build a City Skyline - Step 101

Tell us what’s happening:

Build a City Skyline Step 101
Below its saying to add a “background” property to the class “. fb5” when I have added the property. Could someone please advise on why I’m still getting this error? Any help would be appreciated. Thanks.

Your code so far

<!-- file: index.html -->

/* file: styles.css */
/* User Editable Region */

.fb5 {
  width: 10%;
  height: 33%;
  background-color: var(--building-color2);
  position: relative;
  right: 10%;
  background: repeating-linear-gradient(
    0% 5%,
    transparent 5% 10%
  );
}

/* User Editable Region */

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36 Edg/144.0.0.0

Challenge Information:

Build a City Skyline - Step 101

aren’t you missing a color here? these percentages without a color means that the value given to background is invalid and it is not recognised by the engine, meaning the whole background property is ignored