Niki de Saint Phalle served as Julie de Libran's muse for Sonia Rykiel's Fall '17 collection after discovering that the artist was born in the same year as the house's founder - they both also shared a passion for vibrant colors. These drawstring pants are spun from sumptuous cashmere and have a loose, wide-leg shape with neat pintucked seams along the front. Try yours with similar blue tones.