Who knew matching eyeshadow and hair could be such a good idea?

We've been trained to think more in terms of complementing rather than matching our ensembles together, but Emily Blunt showed us all a way to match certain things precisely for a delightful effect.

The actress showed up to the premiere of her new movie, Adjustment Bureau, looking as romantic as can be for the Valentine's Day occasion. Blunt sported soft copper eyeshadow that was exactly the color of her hair, making for a rather fitting and flattering look.

According to Hollywood Life, Blunt pulled this off so well because she chose a subtle color to match, which "keeps makeup less severe and makes it look less intentionally matchy." Blondes can grab the champagne shadows while redheads should opt for the coppery tones, and brunettes will look good in a number of earthy browns.

Women who try this trick should stick to shimmery pigments and define their eyes with a touch of liner to keep them from looking washed out. Keep the rest of your makeup minimal.

Finally, apply a couple coats of blinc Mascara . The water-resistant formula will give your lashes outstanding fullness and length that won't budge until you want it to.