First, to change the colors of the bullets I downloaded the plugin: Ultimate Plugin TinyMCE. This installed directly into post editing. I wound up not using the colored bullets, although they are there if I need them. Rather, I designed an image in Illustrator that I used to separate topics. I uploaded these into my page via the "media upload." You can see this, it is an orange swirl, on my website: newestartfarm.com. Look under "Helpful Reading."
I have to say, I like the Snow Summit theme very much but it looks as if no one is updating it. I hope this does not mean that we will have to change themes once this one becomes too outdated. I have managed to make some changes by looking over the WordPress Codex and at others' posts.
I hope this helps you. I often feel like a fish flopping around on land for hours as I try to figure this stuff out!