A bb dog produces brown pigment wherever the dog would have produced black, affecting not only coat color but also the color of the skin, eye rims and nose. (ecsca.info)
We are all in favor of the current trend toward the use of brown pigments in leather, paint, and other automotive trim, and Indulgence appears to be the most attractive of the three themes, but Lincoln isn't exactly breaking new ground here. (automobilemag.com)
Thank a genetic switch that turns off your body's ability to make brown pigment in your peepers. (sciencemag.org)