Not only is Kate Middleton embracing pastels, but also the baby blue trend. Kate Middleton turned a royal visit into a fashion show, wearing a light blue blazer that was equally low-key and sophisticated. We're copying the expensive look for only $42! During their 15th wedding anniversary, Prince William and Princess Kate stopped in at a children's charity. Middleton wore her stunning blue blazer with a brown top and matching trousers for an easy, smart casual outfit. Her outfit hit the sweet spot between playful and polished, and it was all because of her chic outer layer.