A guide to colors that harmonize for interior design. The Interior Design Wheel gives home decorators a guide for selecting complementary colors for interior design. The wheel illustrates split complementary, monochromatic, and harmonized color schemes. Packed in a sleeve for insertion in a three-ring binder. 8 1/2 in. x 11 in. (21.6 cm x 28 cm) in protective three-ring binder sleeve.