What is wrong with these people?  Don't they want to sell you a car?
When I went to Verve, the salesman called up a screen of cars and asked what colour I wanted.  There were five or six listed, one of which was in my colour.  I think he'd limited the search to 5-door DSG cars already.  I didn't go for it because I was specific about what extras I wanted and prepared to wait.  I didn't notice what other colours were there, but really, if I'd just said black or white, specs not that important, I'd put money on him having found me a car on the spot.
Rolfe.