[112.3-6406] Players are able to change colours of locked players

[ӔO]

The colours of password locked players are freely editable by any other player.

Possible on server games or local games.

[paco_m]

Player colours are actually only valid within your own client, if you change player colours in a network game nobody else will note this.
The other players will still see the default colours. That's why you are able to change any players colours because nobody else will see the change