It's not running even i am setting bbackground-color blue and yellow respectively;

Tell us what’s happening:
It’s not running even i am setting background-color blue and yellow respectively;

Your code so far

body {
  background-color: #FFFFFF;
.blue {
  background-color: blue;
.yellow {
  background-color: yellow;
div {
  display: inline-block;
  height: 100px;
  width: 100px;
<div class="blue"></div>
<div class="yellow"></div>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36.

Challenge: Learn about Complementary Colors

Link to the challenge:

Are you using an extension that modifies your colors, such as a dark mode? This will disrupt the test suite. Your code passes for me.