Player Colour sets the colour of the company.
Vehicles, buildings & other items show company colour.

Player Colour opens from Game Options.

Click on colour-bar to change company colour.
Titlebar of Player Colour changes (not to new company colour) to indicate new colour is selected.

Default human player colour is light blue.
Some items are not colour-coded & may not display chosen colour.

{Tips: To change AI player colour use Player List or P+ Change Player to select AI player first}.