That would most likely be Melonin (if I am incorrect feel free to improve!)
myoglobin
ceramic pigment
myoglobin gives the muscles the reddish brown color
Because of the colored pigment that is added to it.
One is sepia.
Umber
Dark brown pigment is commonly referred to as "umber." It is a natural pigment made from clay containing iron oxide and manganese oxide, resulting in its rich brown color. Another dark brown pigment is "burnt sienna," derived from heated sienna clay. Both pigments are widely used in art and various industrial applications.
One common yellow-brown pigment is Ochre. It is a natural earth pigment containing hydrated iron oxide. It has been used in art and decoration for thousands of years.
Sepia
Sienna
Sienna
The pigment is melanin.