Mary-Kate and Ashley Olsen in Elizabeth & James at the opening of their new store in Los Angeles, California.

Donato Sardella/Getty Images for InStyle

Who: Mary-Kate and Ashley Olsen.

When: Tuesday, July 26.

Where: A party celebrating the opening of their first Elizabeth & James storefront in Los Angeles, California.

What: Their own designs for Elizabeth & James.

Why: Ashley Olsen debuts a new bleached blonde look for the opening of their Elizabeth & James storefront in Los Angeles's The Grove. The sisters' personal style tends to infuse their designs, whether for Elizabeth & James or The Row, which means a lot of boxy, architectural cuts, vintage-inflected accessories, and a nonchalant air. They coordinate, without being too matchy; Mary-Kate goes dark while Ashley goes light, and Mary-Kate's oxblood alligator bag picks up the same color and texture from her twin's pumps.