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Umber (#635147)

Raw Umber (#826644)

Umber is a natural brown clay pigment which contains iron and manganese oxides. The color becomes more intense when calcined (heated), and the resulting pigment is called burnt umber. Its name derives from the Latin word umbra (shadow) and was originally extracted in Umbria, a mountainous region of central Italy,[1] but it is found in many parts of the world. Some of the finest umber comes from Cyprus. It has been used as a pigment since prehistoric times.

Chemical formula: Fe2O3 + MnO2 + nH2O + Si + Al2O3

Contents

Raw Umber

Raw Umber
About these coordinates About these coordinates
— Color coordinates —
Hex triplet #826644
RGBB (r, g, b) (130, 102, 68)
HSV (h, s, v) (33°, 48%, 51[2]%)
Source ISCC NBS
B: Normalized to [0–255] (byte)

Displayed at right is the color raw umber.

This is the color of the raw natural clay earth pigment.

The source of this color is: ISCC-NBS Dictionary of Color Names (1955)--Color Sample of Raw Umber (color sample #77).

Umber

Umber
About these coordinates About these coordinates
— Color coordinates —
Hex triplet #635147
RGBB (r, g, b) (99, 81, 71)
HSV (h, s, v) (21°, 28%, 39[3]%)
Source ISCC NBS
B: Normalized to [0–255] (byte)

Displayed at right is the color umber.

This is the color achieved when the raw unheated clay earth pigment is processed into refined pigment.

The source of this color is: ISCC-NBS Dictionary of Color Names (1955)--Color Sample of Umber (color sample #61).


Shades of umber color comparison chart

  • Burnt Umber (Hex: #8A3324) (RGB: 138, 51, 36)
  • Raw Umber (Hex: #826644) (RGB: 130, 102, 68)
  • Umber (Hex: #635147) (RGB: 99, 81, 71)

See also

References

External links

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1911 encyclopedia

Up to date as of January 14, 2010
(Redirected to Database error article)

From LoveToKnow 1911

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