Colour assigned to the different elements of an image on the basis of some chosen property of each element, irrespective of any real-life colours; a colour used in this way.
Origin
1960s. From pseudo- + colour.
Definition of pseudocolour in US English:
pseudocolour
(also pseudocolor)
nounˈs(j)uːdə(ʊ)ˌkʌlə
Electronics
Colour assigned to the different elements of an image on the basis of some chosen property of each element, irrespective of any real-life colours; a colour used in this way.