A diamond’s color is extremely important when assessing the quality and cost. Personally, I always recommend a customer to prioritize a diamond’s color over clarity. After a diamond’s cut, color will be the first thing people notice to the naked eye . The industry grades for a diamond’s color on a scale from D to Z. “D” represents very rare completely colorless diamonds. As you go through the alphabet, diamonds will have more and more of a yellow or brown undertone. The closer a diamond is to colorless, the higher the value.