Picked up the Ebbro Citroen. Beautiful model. I began researching the color combinations and found this fantastic French page on the DS, which will provide the information to help make an accurate model, include paint codes:
http://www.nuancierds.fr/entree.htm
The kit itself is a 1958 model year, based on the style of turn signals and appears to be a luxury model with the brightwork on the roof pillars. I am reading and google translating the pages as I go along. So there will be some time for research before I start.
One aspect not totally correct in the instructions is the paint. The inside of the engine bay is the roof color and not the fender color. Pourquoi? The reason is that the car's unit body was the roof color. The fenders, doors, truck and hood were bolted on and paint separately. The rear fenders had a lug nut so that they could be removed in order to change a rear tire.
This site also has information on the interior and the wheel rim colors.