Q: too much orange? A: Yes! I find it somewhat annoying as well; the standard identifier color was so close to plain white that I couldn't easily see the difference -- at least the orange is obvious.
Q: different colors for core symbols? A: Yes! I'm working on exactly that in the second style file (closure.lang in the repo) -- I've just added a screencap. The eventual goal is to distinguish between special forms, built-in macros, built-in functions, %-args, reserved, &, and all others. (I hope I'm not forgetting anything). Suggestions are welcome!
