div {
  p01: #abc;
  p02: #aabbcc;
  p03: #abc + hello;
  p04: #abc + 1; // add 1 to each triplet
  p05: #abc + #001; // triplet-wise addition
  p06: #0000ff + 1; // add 1 to each triplet; ignore overflow because it doesn't correspond to a color name
  p07: #0000ff + #000001; // convert overflow to name of color (blue)
  p08: #00ffff + #000101; // aqua
  p09: #000000;
  p10: #000000 - 1; // black
  p11: #000000 - #000001; // black
  p12: #ffff00 + #010100; // yellow
  p13: (#101010 / 7);
  p14: #000 + 0;
  p15a: 10 - #222;
  p15b: 10 - #222222;
  p16: #000 - #001;
  p17: #f0f + #101;
  p18: 10 #222 + 1;
  p19a: (10 / #222);
  p19b: (10 / #222222);
  p20: rgb(10,10,10) + #010001;
  p21: #010000 + rgb(255, 255, 255);
}