Blue is one of the most difficult makeup colors to pull off—if you make the mistake of accidentally applying too much you can veer into Halloween-costume territory. So when January Jones stepped out wearing the hue in a unique way, we took note. Using powder-blue eyeliner layered atop a black cat eye, Ms. Jones proved the retro look can be quite edgy—far from the prim and proper makeup reminiscent of her Mad Men character, Betty Draper. Pair this anything-but-prissy eyeliner with a lashing of black mascara and neutral lip gloss for your next GNO. And yes, you can totally wear this new makeup look with a modern print like January does, in fact we advise it—bold eye-catching prints are the best way to amp up an otherwise demure cat eye.