He has a face now

I have to admit, I was a little worried about this yesterday. It certainly didn't look like the Yoda I know. However, it came together nicely when I started willing in the missing colors. My only gripe is that he doesn't seem like a very happy Yoda, but hopefully that will change with time to match the pattern (now pixelated for your convenience):

Another source of problems:

Do these colors look the same to you?
This suggests a fourth and fifth rule:

4. If colorblind, have someone check the colors for you.
5. (see rule 3)