If post-modern style gets your heart, this idea is a game-changer. Paint each wall, or even sections of the same wall, in large, bold geometric blocks – think a hot pink half-wall with a sunshine yellow corner, then a royal blue ceiling border. Use painter’s tape to craft perfect lines or use a fluted effect. Use furniture in solid colors that contrast with the walls – like a mustard chair against a teal corner. Add a rug with large intersecting circles or angular patterns. Use clean-lined furniture – a mid-century modern desk in walnut, a white arc lamp. On the walls, add abstract minimalist art in black frames to anchor the vividness.