"Red Flavor" (Hangul: 빨간 맛; RR: Ppalgan mat) is a song recorded by South Korean girl group Red Velvet for their fifth extended play The Red Summer (2017). Written by S.M. Entertainment lyricist Kenzie and produced by Daniel Caesar & Ludwig Lindell (known collectively as Caesar & Loui), "Red Flavor" is primarily a dance-pop song with a summer vibe, while the lyrics hint towards a young relationship with summer references. It was released as the title track from The Red Summer on July 9, 2017 by SM Entertainment, along with an accompanying music video.

Upon its initial release, "Red Flavor" has since received positive reviews from music critics who praised its hook and catchiness for a summer anthem, and appeared on several year-end lists from critics. The song was a commercial success in South Korea, becoming the group's first Gaon chart-topper and their fifth song to sell over a million copies. It also attained success outside of their native country, peaking at number four on Billboard's World Digital Songs chart while becoming their first single to enter Billboard charts in Philippines and Japan.

Following the release of Red Velvet's fourth extended play Rookie in February, SM Entertainment confirmed through news outlet on June 23, 2017 that the girls would be releasing their first summer release and had recently finished filming a music video. This marked the group's second comeback within a calendar year. On June 30, the first batch of teaser photos were posted on the group's official social media accounts. The album title and the full track list which includes "Red Flavor" was revealed on the same day. On July 7, a 19-second video teaser for "Red Flavor" was uploaded on the official SMTOWN channel, with the official video being released two days later. The song had its official digital release on July 9, 2017, along with the extended play.

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