Both in the form of actual cards and online, where players can compete amicably with people all over the world, rummy is still very popular today. Due to its ongoing appeal, creative adaptations such as Rummy Rainbteenpatigoow have been made possible, giving the traditional gameplay a lively new twist. Presenting Rainbow Rummy: A Vibrant Take on a Traditional Game. A new set of rules & a special deck of cards are introduced in Rummy Rainbow, an exciting and vibrant take on classic Rummy. In contrast with traditional Rummy, which usually uses a 52-card deck, Rummy Rainbow uses a specially made deck with cards in a variety of colors and patterns.