However, I'm the same way with coffee. At home I only drink it out of white mugs. Colored mugs change the taste. I will endure coffee in most any cup when away from home...but the worst is cobalt blue. All I can think of is Vicks VapoRub.
Maybe you have synesthesia in addition to OCD?
I don't think it is as strong as an official diagnosis :-). Its more like an association that I think about. Regardless, I prefer stainless.