Hit last year's baby blue with a dose of gray, and voilà — you've got "Avenue Maintain," Essie's chic new take on cornflower blue. Punch it up with unexpected mint and electrifying orange — because cool girls don't do matchy-matchy.

Essie Avenue Maintain, $8, available at Essie; Topshop Textured Crop Jumper, $60, available at Topshop; Rag & Bone Kate Skirt, $395, available at Rag & Bone; Loeffler Randall Rider Bag; $495, available at Saks Fifth Avenue; Elizabeth and James Clair Heel, $295, available at Issay; Madewell Braided Friendship Bracelet, $10, available at Madewell.