Amber (color)
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[edit] Amber
| Amber | ||
|---|---|---|
| <imagemap>Image:Information-silk.png|About these coordinates
rect 0 0 50 50 About these coordinates desc none</imagemap> — Color coordinates — | ||
| Hex triplet | #FFBF00 | |
| RGBB | (r, g, b) | (255, 191, 0) |
| HSV | (h, s, v) | (45°, 100%, 100%) |
| Source | BF2S Color Guide | |
| B: Normalized to [0–255] (byte) | ||
Amber is an orange-yellow color that got its name from the material known as amber. Due to this, amber can refer not to one but to a series of shades of orange (shown below in the shades of amber color comparison chart), since the natural material varies from nearly yellow when newer to orange or reddish-orange when older.
Amber as shown in the color box at right is a pure chroma color on the color wheel halfway between orange and yellow. It is a color that is 75% yellow and 25% red.
The first recorded use of amber as a color name in English was in 1500. [1]
[edit] ECE Amber/SAE Yellow
| ECE Amber/SAE Yellow (desaturated approximation) | ||
|---|---|---|
| <imagemap>Image:Information-silk.png|About these coordinates
rect 0 0 50 50 About these coordinates desc none</imagemap> — Color coordinates — | ||
| Hex triplet | #FF7E00 | |
| RGBB | (r, g, b) | (255, 126, 0) |
| HSV | (h, s, v) | (30°, 100%, 100%) |
| Source | CIECD | |
| B: Normalized to [0–255] (byte) | ||
ECE Regulations used outside North America and SAE standard J578 used in North America both stipulate a range of amber colors acceptable for light emitted or reflected by certain automotive lighting devices. This color is designated amber in the ECE regulations[2] and yellow in the SAE regulation[3] — not to be confused with Selective yellow. In the past, the ECE "amber" definition was more restrictive than SAE "yellow". Currently, ECE amber and SAE yellow are identically defined in terms of the CIE chromaticity diagram.
[edit] Formal definitions of ECE Amber and SAE Yellow
Previously, ECE amber was defined according to the 1968 Convention on Road Traffic[4], as follows:
| Limit towards green | <math>y \le 0.429</math> |
| Limit towards red | <math> y \ge 0.398</math> |
| Limit towards white | <math> z \le 0.007</math> |
Recent revisions to the ECE regulations have aligned ECE Amber with SAE Yellow, defined as follows:
| Limit towards green | <math>y \le x - 0.120</math> |
| Limit towards red | <math>y \ge 0.390</math> |
| Limit towards white | <math>y \ge 0.790 - 0.670 x</math> |
The entirety of these definitions lie outside the gamut of the sRGB color space — such a pure color cannot be represented using RGB primaries. The color swatch to the right is a desaturated approximation, created by taking the centroid of the standard definition and moving it towards the D65 white point, until it meets the sRGB gamut triangle.
[edit] Amber in human culture
- The original Amber Room (Russian Янтарная комната, German: Bernsteinzimmer) in the Catherine Palace of Tsarskoye Selo near Saint Petersburg was a complete chamber decoration of amber panels backed with gold leaf and mirrors. Due to its singular beauty, it was sometimes dubbed the Eighth Wonder of the World.
- The color amber is associated with Zoroastrianism because of its practice of fire worship in fire temples (actually, the holy fire is simply a representation of the energy of God [ Ahura Mazda ] ).
- Amber is a color worn by Hull City AFC, an English football team. This is to represent their club nickname of 'The Tigers' and in many kits is used with black.
- Amber is a symbolic color representing energy.
- Amber is used in traffic lights and turn signals.
[edit] References
- ^ Maerz and Paul A Dictionary of Color New York:1930--McGraw Hill Page 189; Color Sample of Amber: Page 43 Plate 10 Color Sample J3
- ^ ECE R6PDF (316 KiB)
- ^ SAE J578: Color Specification
- ^ ECE Convention on Road Traffic, 1968PDF (163 KiB)
[edit] External links
- UNECE Regulation No. 6: Uniform Provisions Concerning the Approval of Direction Indicators for Motor Vehicles and their Trailers (E/ECE/324-E/ECE/TRANS/505/Rev.1/Add.5/Rev.3/Amend.2)[1][2]
- UNECE Regulation No. 48: Uniform Provisions Concerning the Approval of Vehicles with Regard to the Installation of Lighting and Light-Signalling Devices (E/ECE/324-E/ECE/TRANS/505/Rev.1/Add.47/Rev.3/Amend.2)
it:Ambra (colore) ja:橙色 lt:Gintarinė nl:Amber (kleur) pl:Bursztyn (kolor) pt:Âmbar (cor) ru:Янтарный цвет simple:Amber (colour) vi:Hổ phách (màu)
