The Cushion Formula
For a 3-seater sofa: 2 large square cushions (60 × 60 cm) as back anchors, 2 medium cushions (50 × 50 cm) in a coordinating or contrasting tone, and 1 rectangular lumbar cushion (30 × 60 cm) as the centre accent. The tonal formula: choose a dominant colour (typically matching or closely relating to the sofa), a secondary contrast colour, and an accent (often a print or textured cushion). Avoid matching cushions identically to the sofa — they disappear. A sofa in ivory with dusty blush cushions reads better than ivory-on-ivory.