No need to be flashy during an interview. Opt for conservative, WELL FITTING clothing in traditional business colors and you'll be fine. In fact, with well fitting attire, you'll be miles ahead of most interview candidates.
Suit: Charcoal grey or Dark navy blue. Although black in acceptable, I would save it for the funeral or wedding. Most important is fit: the suit should drape you well, sleeve cuffs shouldnt be too long or short -- take it to a tailor and have alterations done as needed; and opt for for a 2 or 3 button suit
Shirt: White or pale blue, freshly pressed and of sufficient length in the sleeve to allow 1/4 - 1/2 inch of shirt cuff to show when the suit jacket is being worn.
Tie: Conservative colors in either blues, reds, yellows. Striped patterns or repeating polka dots. Brooks brothers has excellent choices.
Shoes/socks: Black captoes that are newly shined. Dark colored socks. I actually saw someone with white socks once and that was a sight to see!
I believe that being well dressed speaks volumes about someone -- this isn't the time to bring out the pinks and greens -- stick with classy.