Colour Accuracy and Gamma

Colour accuracy is determined by displaying a series of different test colours and comparing the displayed value (as measured by the colorimeter) to the expected, ideal value. A complicated formula then outputs what is known as a delta E value, which in simple terms represents how far the displayed colour is from the ideal. Lower values are preferred, since that means the distance is less.



Gamma, meanwhile, refers to how a monitor deals with and corrects for the non-linear relationship between the amount of voltage applied to a pixel and the amount of light emitted. As such, it mainly affects the output of mid-range and greyscale colours. We are looking for a value of 2.2, which is in line with the standard sRGB colour space.