Platform: Windows 10
Frequency: Currently unknown.
How to make it happen: Switching between the Aetherstep Outfit and the All-Day Eveningwear outfit bleaches the Aetherstep outfit red and black, the colors of the All-Day Eveningwear outfit.
It caught me completely by surprise, so no screenshot. But I had a character's hoodie go from blue to red. This change is permanent and affects the character selection screen as well.