[jrockway]

For those of you who don't want to leave Emacs to customize Emacs, you can just put the point near the face that you want to customize, type M-x customize-face, accept the default, and follow the instructions from there. This works in all Emacsen newer than about 18 or so.

[iheartmemcache]

Even simpler, just open a scratch buffer, paste the code, and evaluate the expressions with C-x C-e.

[jrockway]

I am talking about how to, given some code in an arbitrary language and you wanting to change the color of some construct, do that with built-in emacs mechanisms. I think going to a web page, pasting your code, tweaking, and then putting some random lisp back into emacs is a waste of effort when Emacs already has this functionality built in.

[jackowayed]

It's a nice tip, and it could be nice for just changing one or 2 colors, but for totally doing a theme from scratch, I think I'd prefer a color wheel to messing with color hexes.