how is the a risk if you don't wear black? Grey suits look fine. As long as you aren't wearin a bright red pimp suit, i can't imagine there being a difference between black or grey.
That being said, I went suit shopping the other day and walked into Mens Warehouse. I can't blame him for trying b/c he is a salesman, but oh man it was funny. He asked me why i was getting a suit so i told him, and he immidiately tried to convince to buy two suits for 400 bucks b/c "every school requires that you go for a first interview and then if they like you they'll call you back for a second interview, so you dont want to wear the same suit twice." Haha. i was like, nice try buddy. He then proceeded to explain the application process to me (completely backards by the way) as if i came to him for medical school advice.
I ended up leaving with out a suit, but I like the grey look.