RTS Couleur 3 is the third public radio station in French-speaking Switzerland, operated by Radio Télévision Suisse (RTS). Launched on February 24, 1982, it is known for its alternative and youth-oriented programming.

The station specializes in pop-rock music but also plays hip-hop, reggae, and techno. It features humorous and informative segments created by the station's animators.

Couleur 3 broadcasts nationwide on DAB+, satellite, IPTV, and the internet. Until the end of 2024, it was also available on FM in French-speaking Switzerland and the canton of Bern.

In April 2023, Couleur 3 made headlines by broadcasting 13 hours of radio content produced with cloned voices and texts generated by ChatGPT, showcasing its innovative approach to programming.

The station aims to be offbeat and irreverent, appealing to a young audience with its original sounds, unrestrained content, and musical discoveries.