prevent the same or similar colours to be choosen by users
I am administrating an instance of etherpad with mypads and it frequently happens that I choose the same or similar colours for a user. Upon creation of new user, it is unclear to me, if the colour or a similar one is already chosen or not. While on first sight it might seem nice to choose every colour in the colour palette, this turns to make it more complicated. It would be great, if instead it were possible to choose out of a preselected colour range which are not to similar and the user could either not change it or also only choose out of this palette.