Not yet 30 years old, Madrid-born designer Joaquin Trias showed his namesake collection at Mercedes-Benz Fashion Week for the second time. Trias’ background may be in tennis and business, but his fashion lineage is clear, with one of his grandmothers a former model for Cristobal Balenciaga. Solid colors and businesswear punctuated the young designer’s women’s collection, which was shown on the last day of shows at Bryant Park.