One of the tricks to dressing down a smoky eye is to minimize the contrast between your eye shadow shades. It follows, then, that upping the contrast can dress it up.
To create the look, you'll still reach for three colors (sometimes four, depending on your approach), but you'll put some further distance between the shades. So instead of, say, champagne, tan and brown, try ivory, brown and espresso. Instead of ivory, light gray and charcoal, go with ivory, charcoal and pitch black.
Even as you increase the contrast, though, do not forget to blend between each step. Crisp lines can turn a smoky eye from sultry to a little bit sad.
And finally, for those who want to really go bold...