I would add to what ernyoka said and say that unless you are going to a plastic look, you should also set specular color and translucence color to pure black. If you want to change the color of something use diffuse color. All specular does is make objects more or less shiney and you should use shades of grey for that. Translucence just lets light pass through, sort of like polythene does. It too should be a shade of grey. And ambient gives a glowing effect, it you want clothes to glow in the dark use it, otherwise don't.