As we have all agreed to the new wall colour do we have the right to change the colour of our garage doors and guttering? Note that all the garages are undercover and only one garage door of our strata is seen by any visitors as each individual apartment has their own pedestrian entrance way.
I would be tempted to repaint your doors how you want and let chummy nexy door look like the goose he is. But be prepared for him not to pay his share because the paint job wasn’t to his taste.