There are some excellent and up to date photographs of many/most of the sailplanes in the list here:
For example I particularly like this Kirby Kite in its military livery
and on the ground
The resource is potentially a good reference for a colour scheme when the final choice is made. Where else are you going to find over 300 modern, quality photos of classic sailplanes in a single website?
As another example, because the pic I posted above of the Standard Austria is c*ap, try this:
And more photos still: