Collection colours not synchronised

What I did: Utilised colour codes for different collections to denote a state of play for that particular project.

What happened: The colours are not synchronised across dropbox. All of my collections are standard colours on my home machine whilst mixed colours on my works machine.

What I expected:Collection colours to be synchronised between machines.

Things that might be helpful to know (Findings version, OS and model, etc):

Catalina 10.15.1
Findings 2.1