3.2) color.v += 2;
3.3) color.v = (color.v - 50) * 1.1 + 50; // make the light colours lighter, the dark colours darker
3.4) color.v = Math.max(0, Math.min(color.v, 100)); // make sure we're still in range
3.5) color.s = Math.sin(1-(Math.abs(color.s-50)/50)) * 120; // increase the saturation of colours that are 'average saturation'
3.6) color.s = Math.min(100, color.s); // put saturation back in range

4) Match the new colour against a colour from a minecraft block

5) Map the new texture onto the cube