SetColor("khaki");
A named color can also be modified by adding a adjustment factor. An
adjustment factor, 0 < f < 1, a smaller value will give a
darker version and a value of 0 or 1 will return the original
color. A value > 1 will make the color brighter. A
few examples
SetColor("khaki:0.5"); // A darker version of "khaki"
SetColor("yellow:1.2"); // A slightly lighter version of "yellow"
SetColor(array(65,100,176));
SetColor("#A16BFF");
Theme 2: Pastel
Theme 3: Water
Theme 4: Sand