...or charcoal grey? Matters not.

Look good in it. Be comfortable in it. Make sure it fits and it's not the first time you've ever worn a suit. An ill-fitting suit is one self-distraction you don't need on interview day.

You should look at yourself in the mirror and like what you see; color is much less important.

Disclaimer: I wouldn't recommend light blue polyester leisure suit with bell-bottoms and platform shoes, no matter how comfortable you are in those.