pigmented coat/hair area to total coat/hair area ratio +
A calculated measurement in which the value representing the two-dimensional extent of the planar region of the body surface occupied by hair, wool, or fur (cylindrical, keratinized, often pigmented filaments characteristically growing from the epidermis of a mammal) containing proteins or other substances which give that hair the appearance of color, is divided by the value representing the entirety of the two-dimensional extent of the planar region of the body surface of the organism occupied by hair, wool, or fur with or without color, and presented as a ratio, fraction, quotient or percentage. Color is property of a surface or substance due to absorption of certain light rays and reflection of others within the range of wavelengths (roughly 370-760 nm) adequate to excite the retinal receptors.