Sure, by all means if you want the car to look "cool" use them.
However if you want to actually be able to see and be seen while driving at night without blinding the oncoming driver so much that they either hit you head on or go off in the ditch then get real headlight bulbs not the blue tinted crap.
I use Sylvania Xtravisions myself, they are high output without the tint. Since my car uses 9005 and 9006 bulbs I am looking at getting some HIR bulbs (not HID)
www.danielsternlighting.com