Colors Within [Drarry Soulmate AU]

Harry had that black mark on his hand reminding him everyday that he hasn't found his soulmate yet, or that he never would for that matter. His thinking lead him to the Astronomy Tower where he has an unexpected run in with one Draco Malfoy. Why is he still constantly looking for this boy in a crowd? Hermione knows, but Harry has to find out on his own.

A Drarry Soulmate AU inspired by a post on Tumblr that I sadly cannot find again.