Also, don't do the khaki and blazer thing. It's very 4-H and very old school. Not to mention the two different colors and shapes are going to cut you in half visibly, either making you appear top heavy or that you have a huge butt and thighs depending on your body type.
A monochromatic suit. You have a bay right? I'd go for a black suit, a pinstripe shirt, and a black scarf or necklace.