This is the wiki page for the cvar
When this cvar is turned on, the game will show the car in the in-game blue color scheme instead of the usual white freeplay scheme.
To turn on a coloured car in freeplay, open the console and type
Put 0 instead of 1, to turn the colour scheme back to white.
Any change of the BakkesMod configuration made through the console will be lost when you close Rocket League unless you open and close the GUI once or call the command