For those of you who were reading the development logs, especially the shifting "to do" lists, you might have seen me deferring the work on "high contrast" patterns for my artwork - there was a lot to get done, and I kept finding more pressing things to work on. Here's what I ended up coming up with:
which, when you run it through a worst-case colorblindness filter, you get this:
which looks good enough for me. The green is still awfully dark, though.