A question came up recently when I was discussing 914 paint colors with the owner of a '73 Marathon Blue Metallic car. He believes that the original paint color name of a 914 is shown somewhere on the car (he hasn't told me where, yet). My understanding is that only the paint code is shown on the car, as stated in Brett Johnson's 914 book, quote: "the plate bearing the paint number, indicating the original color of the car, is on the left hinge door post."
Other than that plate with the paint code, I am not aware of any other location on the car where the paint name or code is shown. If the plate is not present, you need the COA to be sure of the original paint color (and hope the COA is correct).
If I'm wrong I always prefer to be corrected rather than continue believing my error! So let me know...
Thanks,