Umber
Umber (#635147)
Umber is a natural brown clay pigment that 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.
Umber is not one precise color, but a range of different colors, from medium to dark, from yellowish to reddish to grayish. The color of the natural earth depends upon the amount of iron oxide and manganese in the clay. Commercial colors vary depending upon the manufacturer or the color list. Not all pigments contain natural earths; many contain synthetic colorants, named on the labels. The Italian versions of natural umber and burnt umber are more reddish than some American versions.
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Umber [edit]
| Umber | |
|---|---|
 Color coordinates |
|
| Hex triplet | #635147 |
| sRGBB (r, g, b) | (99, 81, 71) |
| CMYKH (c, m, y, k) | (0, 18, 28, 61) |
| HSV (h, s, v) | (21°, 28%, 39[2]%) |
| Source | ISCC NBS |
| B: Normalized to [0–255] (byte) H: Normalized to [0–100] (hundred) |
|
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The pigment known as raw umber of natural umber came originally from Umbria, in Italy.
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Another sample of natural umber pigment, from the Italian Wikipedia.
Displayed at the right is one version of color umber.
This is approximates 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).
Variations of umber [edit]
Burnt umber [edit]
| Burnt umber | |
|---|---|
| Color coordinates |
|
| Hex triplet | #8A3324 |
| sRGBB (r, g, b) | (138, 51, 36) |
| CMYKH (c, m, y, k) | (0, 63, 74, 46) |
| HSV (h, s, v) | (9°, 74%, 54%) |
| Source | Xona.com Color List |
| B: Normalized to [0–255] (byte) H: Normalized to [0–100] (hundred) |
|
Burnt umber is both a pigment and a color. This medium brown pigment is made by heating umber, a dark brown clay containing oxides of iron and manganese. It is used for oil and water color paint.
The first recorded use of burnt umber as a color name in English was in 1650.[3]
Raw umber [edit]
| Raw Umber | |
|---|---|
| Color coordinates |
|
| Hex triplet | #826644 |
| sRGBB (r, g, b) | (130, 102, 68) |
| CMYKH (c, m, y, k) | (0, 22, 48, 49) |
| HSV (h, s, v) | (33°, 48%, 51[4]%) |
| Source | ISCC NBS |
| B: Normalized to [0–255] (byte) H: Normalized to [0–100] (hundred) |
|
| Terra d'ombra | |
|---|---|
| Color coordinates |
|
| Hex triplet | #8A3324 |
| sRGBB (r, g, b) | (138, 51, 36) |
| CMYKH (c, m, y, k) | (0, 63, 74, 46) |
| HSV (h, s, v) | (9°, 74%, 54%) |
| Source | Italian wikipedia |
| B: Normalized to [0–255] (byte) H: Normalized to [0–100] (hundred) |
|
Displayed at the right is one version of the the color raw umber.
The second box, Terra d'ombra, is the Italian version of natural umber, from the Italian wikipedia.
These approximate 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).
| Terra d'ombra bruciata | |
|---|---|
| Color coordinates |
|
| Hex triplet | #712F26 |
| sRGBB (r, g, b) | (113, 47, 38) |
| CMYKH (c, m, y, k) | (0, 58, 66, 58) |
| HSV (h, s, v) | (30°, 66%, 44%) |
| Source | Italian wikipedia |
| B: Normalized to [0–255] (byte) H: Normalized to [0–100] (hundred) |
|
The second box at right shows Terra d'omba burciata, or burnt umber, as shown in the Italian wikipedia.
See also [edit]
References [edit]
- ^ Blick Art Materials, 00501-8054 — Burnt Umber
- ^ web.forret.com Color Conversion Tool set to hex code of color #635147 (Umber):
- ^ Maerz and Paul A Dictionary of Color New York:1930 McGraw-Hill Page 191; Color Sample of Burnt Umber: Page 53 Plate 15 Color Sample A12
- ^ web.forret.com Color Conversion Tool set to hex code of color #826644 (Raw Umber):
External links [edit]
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