"Dust to Dust" (色のない世界, Iro no nai Sekai?, lit. Colorless World) is a theme from Final Fantasy XIII. It was composed by Masashi Hamauzu and arranged by Mitsuto Suzuki. The lyrics were written by Frances Maya and the vocals were provided by Matsue Hamauzu. Like many other tracks in the game, it features female vocals, evoking a sense of nostalgia and longing for times past.
The vocal part intertwines with the motif of "Blinded By Light", one of the main themes of Final Fantasy XIII, though the overall feel is much slower and wistful.
"Dust to Dust" plays during Beginner's Primer summary for Chapter 11 and makes a brief appearance as background theme for the Dying World 700 AF with an analogous use for Oerba: it plays as Noel Kreiss is in a dream world created from past memories of his home.