public static ColorExpression parseColor(HiddenTokenAwareTree token, String string) {
if (string == null)
return null;
if (NamedColorExpression.isColorName(string))
return new NamedColorExpression(token, string);
double red = decodeColorPart(string, 0);
double green = decodeColorPart(string, 1);
double blue = decodeColorPart(string, 2);