blue! and if you want to do a little more work than you initially bargained for, Vanson leathers makes a blue "glow in the dark" leather that would RAWK on a Nightwing costume
I was just asking myself this same question for my 2016 Nightwing build and you have all given me an answer. I dont think anyone on here has said Red. So blue for me it is
Man I had to put a couple of pictures up. I have to agree, the blue looks much better in my opinion. Although the Red could be Bad Azz as well. Good luck!
Part of the minority right now but I think red is better. Keeps him part of the family (Red Hood, Red Robin and Robin). Have absolutely no problem with blue, just like red better.
As long as he has finger stripes, I don't really mind.