Ollie Kepler's Expanding Purple World (2010)

Astronomy buff Ollie Kepler moves in with his best friend after losing his fiancée, only to be drawn back to the place of her death. There, a broken promise returns to haunt him with growing intensity. Battling for redemption, Ollie escapes into a nightmare world of his own creation. But his ever spiralling mind stumbles on a way out. Somehow purple holds the key.