[3] Both standards designate a range of orange-yellow hues in the CIE color space as "amber".

Previously, ECE amber was defined according to the 1968 Convention on Road Traffic,[4] as follows: Recent revisions to the ECE regulations have aligned ECE Amber with SAE Yellow, defined as follows: The entirety[clarification needed] of these definitions lie outside the gamut of the sRGB color space — such a pure color cannot be represented using RGB primaries.

The color box shown above is a desaturated approximation, produced by taking the centroid of the standard definition and moving it towards the D65 white point, until it meets the sRGB gamut triangle.

[citation needed] The color temperature of LED lamps is called amber when their wavelengths are about 590 nm.

Chronomatic low-pressure sodium-vapor lamps emit light ranging from 580 to 590 nm.