Turkish? HOLY COW! I'm not sure if I've ever seen any color research on Turkish planes. There might be hope in that several German aces flew for the Turks.
Have you tried the Aerodrome? You probably won't get swatches but you might get some leads on what, if anything, is known about their colors.
Do a search and or post here-
http://www.theaerodrome.com/forum/camouflage-markings/