Mid-century artists and grade-school kids with crayons aren’t the only souls dialed into the simplicity of color blocking, aka pairing squared-off, geometric planes of clear hues with similarly shaped neutrals. “Fashion and interior designers use color blocking to bring order out of the chaos of everyday life,” says Douglas Burton, co-owner of Apartment Zero (703-538-2309, apartmentzero .com). His Arlington design firm helped the SPAIN Arts & Culture organization and curator Juli Capella put together “S.O.S.: Spanish Office Showroom,” an ongoing exhibit of mod Iberian furniture at the Former Residence of the Ambassadors of Spain in Columbia Heights. The show’s sleek vibe served as an ideal background for fall’s color-blocked, graphic workwear: tri-tone dresses, black-on-bright coats and geometric-cool bags.