Diamond color is graded from D (colorless) to Z (tinted). Colored diamonds are those which have a strong, even color such as yellow, pink or blue. These are referred to as ‘fancy diamonds’ and are extremely rare. Because of their rarity, colored diamonds are highly desirable and may be quite valuable. Natural brown diamonds, also referred to as Champagne or Chocolate diamonds, are growing in popularity and are a quirky alternative to the classic white diamond.