Looks like you're rolling, my friend, and your artwork is very nice.
Just a tip---I've had pretty good luck on matching background colors on my homemade decals, but those printed on white decal paper may need the cut edges touched up. It's often easiest to do this before applying them, using proper color markers or paint. But if you use paint, be careful---too much and you'll seal the edge to the backing paper, making it very difficult to separate. [Voice of painful experience speaking, there.]
Good luck with your projects!