Dunno how that dialogue is called in the english potatoeshop (V6.0 if that makes any difference). In german it's called Farbton - Saettigung .. which may be "hue - saturation" (wild guess)? You'll reach it with ctrl - u ... in there you can adjust the colours, their saturation and their lab-brightness. I took the option "colourize" (Faerben - in the lower right) and than took that deeply saturated blue with a slightly lowered brightness. I'm really sorry if i've disappointed you with the colours not being created by light .. Regards, Tom