Variated Color in Luminated Surface?

[WAS]

Is it possible to easily obtain multiple colors in a illuminated surface? I notice we only get the one light source color in luminosity. 

[Hannes]

There's luminosity image and luminosity function in the default shader where you can add variation.

[WAS]

Oh right, the Default Shader. Always forget about it's beauty. I used it for some nice semi-transparent looking sand awhile back.