Smiley faces, daisy centers, gold stars on middle school papers — good things come in sunny shades. This season’s hottest color is no different. From buttercup to marigold, yellow perks any spirit. After all, what other hue can brighten with the blink of an eye?Vanessa Barrantes Alison Ruffle Jumper Dress, $385; at Ronherman.com. See photo. Franny Yellow Ruffle Front Blouse, $253; at Traceyross.com. See photo. Mimo Tank Dress, $156; at Lisakline.com. See photo. Castle Starr Belted Dress with Beaded Neckline, $485; at Ronherman.com. See photo. Tory Burch Gerritt Dress, $295; at Toryburch.com. See photo. Twelfth Street by Cynthia Vincent Sheath Tunic, $288; at Searlenyc.com. See photo.