Spring's colors have rocked the palette, from pretty pastels to bright neons. But one that's a bit more wearable is the purple quietly making its way down runways. Narciso Rodriguez's trademark neutral frocks mixed it up with lilac and grape day dresses. Michael Kors took the hue full-length, sending Tanya D. out in a runway-grazing, deep pastel dress with a matching elongated cardigan. And Ralph Lauren went formal with a strapless, shiny, plum gown. With color like this, it's shaping up to be a royal season.