Shades of white are colors that differ only slightly from pure white. Variations of white include what are commonly known as off-white colors, which can be seen as part of a neutral color palette, or yellow that resembles brown. In color theory, a hue is a pure color mixed with black (or lower brightness). Strictly speaking, a “white hue” would be a neutral gray. This article also discusses off-white colors that differ in hue and chroma (also known as saturation or intensity) from pure white. Colors often referred to as “white” include cream, eggshell, ivory, Navajo white, and vanilla. But room lighting can also cause pure white to appear off-white. Off-white colors were ubiquitous with beige in the 1930s and became particularly popular again between 1955 and 1975. In terms of color, off-white colors are becoming increasingly popular, Benjamin Moore has 152 shades of off-white, Behr 167 and PPG 315 Whiteness measures the degree to which a surface is white in colorimetry.