It’s time to celebrate, people. Tomorrow, March 20, marks the official first day of spring. And you know what that means. You’re about to see fashion slink out of the shade and into the sunnier side of life. For Spring 2015, there was one color that dominated above all others — yellow. Designers like Oscar de la Renta, Naeem Khan and Lela Rose popped the cheery hue into floor-sweeping evening wear, while Delpozo, Marni, Michael Kors and more offered day wear, sunny-side up. We spotted neon, canary, lemon, mustard — you name it. The key to being on-trend here lies less in the silhouette and more in the depth of color. In short: Ditch the pastels. Go bright or go home.