Umber

Umber is a color that can be described as a dark brown with hints of red or green.
It is named after a natural pigment that was made from soil rich in iron oxide and manganese oxide.
Umber has been used by humans since ancient times, and it can create a sense of depth, realism, and shadow in art.
Umber is a versatile color that can vary in shade and tone depending on how it is mixed or heated.

Some possible ways to describe it are:

• Umber is a brownish color that comes from a natural earth pigment containing rust and manganese.
  It has a long history of use in art, where it can add realism and contrast to paintings.
  Umber can have different undertones of red or green, and it can change in intensity when heated.
• A natural pigment made from soil with iron and manganese gives umber its dark brown color.
  Umber can look more red or green depending on the proportions of the components.
  Artists have used umber for centuries to create shadows and depth in their works.
  Umber becomes darker and more vivid when burnt.
• The color umber is derived from a pigment that was extracted from iron and manganese rich soil.
  It has a dark brown hue that can lean towards red or green.
  Umber has been a popular choice for artists who want to create realistic and dramatic effects with light and dark.
  The color of umber can be altered by heating it.