What colors can you use for smokey eyes?

I mix it up. I use also midnight blue, grey, even dark silver, graphite - black/charcoal color, browns. Hmm... I think you can do the smokey eye with every darker color (with the exception of red - and that's because I'm limited in my imagination there... I think it'd look freaky).
 
Smokey eyes can be done with any colors possible. My favorite look is the classic deep black fading into dark brown then a highlight. One look I saw was deep black to navy blue to silver. GORGEOUSSSSS.