If you have lots of vim color schemes and you want to check each one out, then, I don’t think anything could be better than this. Check it out.
If you are unsure of how to use it, first save the file ( Found below the Script Section or download it from here) into your plugin directory ~/.vim/plugin. If it’s not there, make one.
mkdir -p ~/.vim/plugin cp setcolors.vim ~/.vim/plugin
Restart vim or you can source the file from Vim for immediate effect, like done below.
Now press F8 to try next scheme
Shift F8 to try previous scheme ( if any )
Alt F8 to try a random one.