About Diamond ColorWhite diamonds are not all colorless. The spectrum ranges from light yellow to totally colorless. A lettering system from D to Z identifies the amount of color present, with D awarded only to rare, totally colorless diamonds. If you invest in the lowest color grade that looks appealing this will allow you to purchase a larger diamond in the same budget. Diamonds rated D, E and F are considered colorless. G, H, I and J are nearly colorless and can be bought at a lower price. Note that diamonds may also be pink, blue, brown or bright yellow, but these fancy colored diamonds are rated on a different scale than white diamonds.