Can you please set some suitable background color for Pmenu and PmenuSel

[rasivasu]

This colorscheme is awesome and I have been using it for the last couple of months. Last week, I installed the plugins snipmate and autocomplpop. After installing these plugins, I find that the popups aren't using any distinct background colors and hence, the outline of the popup doesn't look as good as it can. While I couldn't fix it by making change directly to codeschool.vim, I would like this change to go in this awesome colorscheme source code and hence I am creating this issue.