How to change the color of specific calendars?
Samsung has their own Calendar in TouchWiz, it is not the "Stock" calendar. And from what I remember, you cant change the color of the calendars in the TouchWiz calendar. I stopped using the touchwiz calendar and bought "Business Calendar" - there is a free version too that has ads and missing a couple features like "drag&amp;drop". It works great, and has a good home screen widget too.

I used it as a replacement for the limited calendar in touchwiz, and now that I have a ROM that has the "stock" calendar, I still use it.