In 1379, one Thomas de Crosby was entered in the Poll Tax Returns of Yorkshire, and in 1383, Henry Crosseby, witness, was noted in the Assize Court Rolls of Warwickshire. Sir John Crosby was sheriff of London in 1470, and Brass Crosby, lord mayor of London (1770), became president of Bethlehem Hospital in 1772.
Monochromatic colors are all the colors (tints, tones, and shades) of a single hue. Example of a monochromatic color scheme. Monochromatic color schemes are derived from a single base hue and extended using its shades, tones and tints. Tints are achieved by adding white and shades and tones are achieved by adding a darker color, gray or black.
Chromatic Colors. Any color in which one particular wavelength or hue predominates. For example, blue and green are chromatic colors, while white, gray, and black are achromatic colors, as they have no dominant hue (all wavelengths are present in equal amounts within those colors). White light is considered achromatic, as it possesses no dominant hue. It is only when one particular wavelength (for example, red) is filtered out that the light becomes chromatic, possessing the color which is the opposite of the light that was filtered.