Have just posted this on another forum - might be of interest to some

Bear in mind colours on a model need to be lighter than on the real thing.

Its to do with distance and scale effect.

When you look at mountains in the distance they turn pale blue...............No matter what their real colour is

When you see a model at 1/72nd scale at 1ft its like looking at the real thing at 72 ft

Same with a 1/35 scale at 1ft its like the real thing at 35 ft

So a 1/35 scale model at 10ft is like the real thing at 350ft

and so on ...............

Colours fade over distance - as most professional artists know.