It can be hard to find just the right colour scheme, and Vim doesn't exactly make it easy to quickly switch between them. Ultimate Colorscheme (GitHub: biskark / vim-ultimate-colorscheme-utility, License: MIT) by Kevin Biskar allows you to browse your colour schemes, and favourite them. Favourites can be associated with filetypes, so you could use different schemes based on programming language.
fmapping for more convenience. You may be able to forget the existence of
;. And you can use
;for another mapping.