My first favorite color to wear is M.A.C Cyber AB8. Sells for 14.50 for a 0.10oz. It's like a deep, dark purple with a satin finish. When I wear it, it doesn't wear off too quickly but I find that I have to go over my lips with it at least two- three times to get to the darkness that I want. I've gotten a few compliments when I wear it from men. One guy said "I like when you wear that color, it kinda does something to me" o_O oookkkaaayy... Anyhow, here is what it looks like if you aren't familiar with it.
This color would be great for halloween if you're gonna be a sexy Vampire. Which I plan to be Akasha from Queen of the Damned this year... What do you think?