Adjust the Hue of a Color Problem

Tell us what’s happening:

can anyone please Help!
i cannot figure out my error.
Your code so far

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

Your browser information:

User Agent is: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0.

Link to the challenge:

Firefox ESR has some problem with this challenge :frowning:
FCC - Bug with hsl

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