Yume Iro is a Japanese Yume Nikki fangame, inspired by two games at once - Yume Nikki, and a derived, but unrelated work, Witoru. Just like the original Witoru and its few fangames, this work's design is minimalistic and ​also contains various parodies and references to Japanese pop culture.

In this game, the player takes the role of a girl named Otetsuki who cannot leave her room. As with most traditional Yume Nikki fangames, the player's objective is to collect effects and explore the dream worlds.