Interior Space and Exhibition Design 75 Degree White Residential Space by Cheng-Hsuan Huang 75 Degree White is a residential interior design for an apartment of 139 square meters. The interior contains 75 percent white space. Gray floors and black furniture emphasize the visual effect and the purity of white. A curved ceiling in the living room reduces the heavy look of the rigid girder and makes the rooms appear larger. Curved wall corners soften the passage to the resting areas. A seamless floor material is applied throughout. The open public area lets sunlight reach the kitchen.