Rainbow S.p.A. (also known as Rainbow S.r.l.) is one of Club 57's production companies. It is an Italian television studio co-owned by Iginio Straffi and Viacom. It began as an animation studio, producing cartoons like Winx Club and Huntik, and has since expanded to live-action shows like Club 57.
The founder and president of Rainbow, Iginio Straffi, is a producer for Club 57. Straffi's wife, Joanne Lee, is an executive producer for the show.