The most important it that your clothes related to your personnality.
Otherwise, some people will noticed it, some won't be able to state the exact reason but all will feel you look weird, and that's a no-go.
In doubt, go for classic. If really in doubt, go for pilot 'uniform', dark blue pants, white shirt, blue tie, dark shoes.
Wear something comfortable, if you are not at ease, they will ask themselves why ('Is it because he is lying about his experience' will come to their mind more easily than 'he should have choosen shoes one size bigger'....).
Best of luck