Trying to edit/create a Vim color scheme
 

I copied a color scheme:

$ cd ~/.vim/colors
$ cp ron.vim luc.vim

Then I edited luc.vim:

let g:colors_name = "luc"
(changed from "ron" to "luc")

Then I ran :colo luc, but the colors don't change.
Then I ran :colo and the answer is luc, but the colors don't change.

What am I doing wrong?

Please refer to the link below - http://vimcasts.org/episodes/creatin...hemes-for-vim/