Honestly I'm used to the black one. It's more modern and fits in with his persona. Blue isn't the stealthiest of colors, it's like how Naruto's jumpsuit was orange...he's a frickin' ninja! Orange is literally the color hunters use to make their presence known for safety concerns. That having been said, I really like when he has a very dark blue cape and cowl. See Batman: Hush for reference.
Anyways, what do you guys think?