kouto-swiss/test/cases/functions-monochrome.css

A complete CSS framework for Stylus

body {
  background: #f55;
  background: #ff2a2a;
  background: #00c000;
  background: #00a000;
  background: #55f;
  background: #2a2aff;
  background: #000;
  background: #000;
}