Wiktionary
alt. Used attributively to describe an image having colours that are different from reality, especially one in which the colours used have a physical signficance (e.g. representing temperature etc.) n. Used attributively to describe an image having colours that are different from reality, especially one in which the colours used have a physical signficance (e.g. representing temperature etc.)
Usage examples of "false colour".
As he did so, whole vast volumes of stars changed from one false colour to another, indicating where this Cluster Epiphany Five Disconnect hegemony had spread its influence.
Computerized systems then generate maps of 'slices' through the brain at defined coordinates and the black-and-white images are false colour-coded by computer to help visual resolution.
It touched the skin with false colour as if nature tried to make amends.