contrast-theme.css

.contrast-toggle--grey {
  background-color: #787C7E;
}

.contrast-toggle--yellow {
  background-color: #c9b458;
}

.contrast-toggle--green {
  background-color: #6aaa64;
}

.contrast-toggle--orange {
  background-color: #f5793a;
}

.contrast-toggle--blue {
  background-color: #85c0f9;
}