false colour
Having colours that are different from those of reality, especially such that the…Having colours that are different from those of reality, especially such that the colours used correspond to some physical or spectral significance (e.g. representing temperature, wavelength, species of microbe, or other meaning).
Meaning
1 senses(attributive, especially)Having colours that are different from those of reality, especially such that the colours used correspond to some physical or spectral significance (e.g. representing temperature, wavelength, species of microbe, or other meaning).
A false-colour image from a microscope helps highlight the variety of microbial species present in a single sample of soil.
The temperature gradient is shown here in false colour for convenience.