Nothing spells spring like powder blue, bubble gum pink, lemon yellow and lilac. At once girlie and glam, colorful denim is the perfect companion to warm-weather staples like a white tank and cream-color wedges -- just check out Cameron Diaz's Rag & Bone look. "Flowy blouses also highlight the feminine feel," says Rosella Giuliani, creative director of Gap 1969. But remember -- keep it light!