A ROYGBIV of colors across 7 3-layer Dice - White Numbering "Sui Generis. Latin, meaning “of it’s own kind”. Sui Generis Dice are dice that have a completely unique design unto themselves. This Sui Generis set is designed to reflect the various colors of the rainbow, with each die bearing one of the seven colors, in order from the Reds of the d20 down to the Violets of the d4. Each die is a 3-layer ombre of itself, while the d6 and d20 each bear unique cloud & rainbow icons! Every set comes in the GKG Dice Tower Dice Case! Made of high-impact resin, with the same layering process we invented in 2013 that prevents air-bubbles from forming inside, Gate Keeper Games dice bear the honor of being the heaviest, densest, and most well-balanced resin dice on the planet!"