Refers to the degree to which a dimaond is colorless. The closer a diamond is to colorless, the more rare and valuable it is. Diamonds are graded on a color scale established by the Gemological Institute of America (GIA). Grades D, E, and F make up the colorless range which are very valuable. The Near Colorless Range of G, H, I, and J is very popular and offers a lot of value. Color differences can be very subtle and grading is done under measured lighting and compared against a “master diamond” for accuracy. This color chart is representative of the color grades of a diamond. *Note that this chart does not apply to fancy color diamonds such as yellow, pink, and blue which have their own system for grading. For diamond shapes like round brillaint, emerald, asscher, radiant, cushion we would recommend a J color or above. For elongated diamond shapes such as pear and oval, I color and above is a good option. Do note this also fluctates based on the diamond and your color sensitivity.