Re-coloring clothes tutorial

Bangel image from http://www.buffyguide.com

A request from my friend
She saw how I changed buffy's dress in a recent wall I made for a custom user layout and wanted to know how.

I thought it was pretty simple and tried to explain in IM but that didn't work out so much so here it is.
You can change the color of anything with this, just need some fiddling.

I used the 'a' word in this. Well technically I put the word 'half' in front of it lol but here's the fair warning. Don't look if that tiny amount of swearing bugs you.

Also I know it's neon purple, I was in a hurry and look I missed a typo XO