Rialto, Color: Umber 25/5222 color swatch. October 28, 2014 by Bellbridge Rialto, Color: Umber 25/5222 color swatch. Rialto is cut/loop wilton fabricated with 50% tencel and 50% wool yarns in colors of white and brown. The yarns create a design motif that resembles interconnected circles.