What color is Book Illustration, Ornamente aller klassischen Kunstepochen (Ornaments from all classic periods of art), pt. 1, no. 11; Antike Wandmalereien in der Casa del Gran-Duca di Toscana, in der Strada della Fortuna zu Pompeji (Ancient wall mural from the House of the Grand Duke of Tuscany on Fortuna Street in Pompeii), plate 51 ?