I just installed sublime text 3 and some themes/color scheme packages and schemr and switched color scheme (using schemr) but ST3 keeps switching it back to default monokai. Is there some other recommended way of switching color schemes?
You might want to open an issue with the maintainer of Schemr, describing exactly what's going on, what settings you have, and what (if anything) causes the scheme to switch back to Monokai.
Browsing through Package Control, I found the following possible substitutes for Sublime Text 3:
All of them do slightly different things and require slightly different amounts of setup, so check them all out and see which one(s) you like. Good luck!