"Mugon... Iroppoi" (MUGO・ん…色（いろ）っぽい, lit. "Silence is... Sexy") is a song recorded by Japanese singer Shizuka Kudo. It was released as a single by Pony Canyon on August 24, 1988. It was used in the Kanebo Cosmetics televised ad campaign of fall 1988, for which the catchphrase was "n... Iroppoi". Kudo made her first appearance on the 39th Kōhaku Uta Gassen and performed "Mugon... Iroppoi" for the Red team. The song was nominated for the Grand Prix at the 30th Japan Record Awards.