So, don't be afraid to mix and match warms and cools, as Longo explains:
Brown eyes (warm) can look beautiful with blue eye shadow (cool) — as seen on Keri Hilson.
Blue eyes (cool) can look great with brown eye shadow (warm).
Green eyes (cool/neutral) can look fantastic with topaz eye shadow (warm).
Hazel eyes (warm/neutral) can look stunning with purple eye shadow (cool).
And when in doubt:
Longo recommends the following universally flattering colors: for the eyes, go with a brown, beige, or black, as found in Vincent Longo Cosmetics' lip stain in Cherry ($23) or Perfect Shine gloss in Ella ($22); and for the cheeks, you can't go wrong with a warm coral.
But do be careful with blush and foundation:
"If you get the foundation or blush shade wrong and not matched to the skin tone, this can look ghastly," Longo says. (Be sure to check out these tips for picking the right foundation and choosing the right blush color.)