Contrast refers to the difference in the luminance or color of objects that differentiates them from one another. In interior design, contrast can be achieved by three elements namely color, form and space. One can use pillows or prints of two opposite colors like black and white to achieve contrast and make an object distinguishable. Contrast can also be achieved by combining two or more forms; for example one can combine a circular mirror and a rectangular sofa to balance and distribute the attention between both the items. One can also achieve contrast in a living space by dividing the available space efficiently into usable positive and negative spaces.

Designers cheat sheet

Emphasize desired colour, size, light or distance using contrasting colours or textures. 

Grasscloth wallpaper will make a marble wall seem even more smooth and cool at a demarcation point, for example where a corridor ends and the elevator area begins.