I apologize, I read the original question wrong. I thought you were meaning how many "different" colors are there in early mustangs?.
All that book will do is give you the the differnt colors used and the production totals for stuff like: Hardtop, Standard interior; Hardtop, Deluxe interior; Convertible, Standard interior; etc... as well as the paint codes for the color you want from Ditzler, DuPont, and Ford.