I can see there's some touch of blue, too! Nice job! His glowing silhouette implies he's a powerful superhero. The red and blue parts were a great idea. as well And... I also like the fact that there is so much space around him.
Whoa, that's pretty awesome. It's really cool how you made the inside lines so smooth. I love the overall look of this, it's a really effective technique to leave an impression. I like how even though you added colour, you still kept it dark.