I got bored and decided to make a few changes to my original art, and I think it looks better because of it. I added the sun setting behind the building and the flare it would cause. Also, did some changes to the shading to the characters to make the light harder.
This is one of my favorite pictures. The original sketch was done by Lime (kaitigah), and I did all the colorization on it through Photoshop after I got it from him. It was probably the fastest, but best, one I've done for him.
I like how it turned out because of the strong dynamic colors. It kind of reminds me of a comic book. In this sketch I used many things I had never used before in past colorizations I've done for him. Various gradients, layers, filters, different styles of dodging and burning. It worked well though.

Kai and artwork ©  kaitigah
Colorized version also © me