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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <div class='rainbow-wheel'></div>
              html { overflow: hidden }
body { background: gainsboro; } 
.rainbow-wheel {
  position: relative;
  margin: 1em auto;
  border: solid 2em white;
  width: 16em; height: 16em;
  border-radius: 50%;
    linear-gradient(36deg, #272b66 42.34%, transparent 42.34%) 0 0,
    linear-gradient(72deg, #2d559f 75.48%, transparent 75.48%) 0 0,
    linear-gradient(-36deg, #9ac147 42.34%, transparent 42.34%) 100% 0,
    linear-gradient(-72deg, #639b47 75.48%, transparent 75.48%) 100% 0, 
    linear-gradient(36deg, transparent 57.66%, #e1e23b 57.66%) 100% 100%,
    linear-gradient(72deg, transparent 24.52%, #f7941e 24.52%) 100% 100%,
    linear-gradient(-36deg, transparent 57.66%, #662a6c 57.66%) 0 100%,
    linear-gradient(-72deg, transparent 24.52%, #9a1d34 24.52%) 0 100%, 
    #43a1cd linear-gradient(#ba3e2e, #ba3e2e) 50% 100%;
  background-repeat: no-repeat;
  background-size: 50% 50%;
  transition: 1s;
.colorWheel:after {
  position: absolute;
  top: 50%; left: 50%;
  margin: -2.8em;
  width: 5.6em; height: 5.6em;
  border-radius: 50%;
  /* add slash at end of line to see central part *
  opacity: .15;
  background: white;
  content: '';
.colorWheel:hover {
  transform: rotate(360deg);
detailed explanation about the maths of how to compute angles and percentages for the gradients  http://hugogiraudel.com/blog/css-gradients
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