To color or shade, That is the question

I won this in a  blog give away a while ago. Had been meaning to work on but other things took precedent. It fits in a plastic ring and the center is either a mirror or a dry erase message board. Has magnets so it can hang on a locker. Here is a link if you want to see them. I did not take a long time to do this but when done my brain is a little foggy. Looking for some opinions about whether should use color or traditional black/white and shading. This is not a voting thing. I will make the final decision, but just looking for feedback. Here is the basic design that I have so far.

Thanks for visiting. As always your comments are welcome, encouraged, and appreciated. In this case also requested.

Go Tangle !!