Nicole Richie kept her newly dyed purple hair at the Met Gala 2014 while she looked skinny in a Donna Karan Atelier gown -- see the pics here Credit: Dimitrios Kambouris/Getty Images (2)

The theme may have been "White Tie & Decorations" but Nicole Richie opted for purple at the Metropolitan Museum of Art's Costume Institute Gala.

The fashion designer looked slender in a Donna Karan Atelier custom-dyed Sage backless graphic devore velvet gown with tiny asymmetrical straps that criss-cross around the back.

The 32-year-old mom paired her dress with her recently dyed purple hair, which she wore in an elegant updo. PHOTOS: See the best dressed overall the Met Gala through the years

Richie opted for Christian Louboutin shoes, but still rocked her own line, wearing House of Harlow 1960 jewelry paired with pieces by Catbird.

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