Automated way to convert a vim GUI color scheme to work with 256 color vim?

Question

I have a GUI-only vim color scheme that I would like to convert to a 256 color version. Is there an automated way to do this?

Googling only found http://www.vim.org/scripts/script.php?script_id=1809 which didn't work for me (the colors turned out completely wrong) and isn't really meant to do a conversion to be saved and reused, but rather it's for on the fly conversion.

Answer 1

You can use CSApprox which is a plugin converting GUI color schemes to terminal color schemes.

I have tried it once or twice and the result was acceptable.

Answer 2

I'm using gnome-terminal and simply adding

set t_Co=256

to my .vimrc file made all the difference