the subject of color. as it relates to the human eye and brain, is complex and fascinating. overall, there are many factors that can affect the perceived color of a surface. models like munsell use an alphanumeric notation to identify the dimension for a color and and its location within the color space. a munsell notation within the color space. a munsell notation (hue, value. and chroma) dwpends on a subjective visual judgment made by a human observer. there are other color-order systems that specify color by objective three-dimensional insstrument number.