Over the weekend, while spending quality time with daughter Honor in LA, Jessica Alba created a whole new fresh color combo we all must try this Spring and Summer: chartreuse and cobalt. The actress topped her cobalt maxi dress with this Theonne chartreuse cropped cardigan ($258), then matched things up with blue ankle-strap platform Ralph Lauren sandals. A crisp white Tory Burch fedora added a resort feel, while her colorful Simone Camille bag ($975) lent an exotic vibe. Get Jessica's exact Theonne chartreuse cardigan to top over your cobalt maxi, cobalt jeans, or cobalt shorts. Then for an office-appropriate look, wear your chartreuse cardigan with a pair of chic wide-leg cobalt trousers from Asos ($70).