A warm orange is one of my favorite accent colors. It lives easier the say red a (color most people get wrong). It adds warmth and pop and looks great on traditional furniture shapes. Here the abundance of it set off by the killer (primitive-mod) graphic element really works. Note chairs clustered around a coffee table are far more versatile then sofas.
SPLIT-COMPLEMENTARY When you select one dominant color and the two colors found on either side of its compliment. Dominant color = Orange Two colors on either side of opposite = Blue-Violet (found in painting) and Blue-Green (this one is more of a true Green but found in the upholstery)