what can i wear with purple smokey eyeshadow?

If you're going for an intense eye, it is always wise to keep to rest of the face rather minimal. That means nude or soft pink lips, and a soft blush.
When it comes to clothing, you want to keep the color palette around the purple tones. Try blacks that have a dash of purple. This will really makes your eyes pop. Even if you have a very neutral clothing, with no color what so all (blacks, whites, browns, grays), you can still pull of the purple smokey eye if you maybe add some purple accessories. Try a purple clutch, a purple handbag, a purple headband, or purple shoes!

Good luck!

Face : go easy on eyebrows, blush and lips.
Go one or two shades lighter on brows.
Pink blush or bronzer, but be very, very light-handed with it.
Nude color or pale pink for lips; could be matte or a wash of sheer gloss.

Clothes : Grays work extremely well here, beside the obvious choices of black and white.
Baby pink, hot pink, yellows, silver, gold -- these colors, whether in main clothing item as primary or in accessories as a splash of color over gray/black, will compliment your purple smokey eyes.

More details would be nice. Are you talking about clothing? Wear whatever you want. Or other make up? I wouldn't wear a strong colored lipstick (neutral or nude) and minimal blush.

nothing!