Yes, you can color this.
Please give me credit for the line art if you upload it though.
Oops, I drew a thing.
I decided that it'd be pretty cool to do a series of these. Partly to practice drawing Sonic characters, and partly to practice coloring before I color my Digimon picture. Tails is next once I finish coloring Knuckles!
Knuckles (c) Sega