Some time ago I changed the background color for inspector comments (to yellow). Now I need to get rid of that, and can’t. In Preferences > Appearance I changed Quick Reference > Comments background – and nothing happened in the inspector. The old comments stayed yellow, and when I created a new one it was yellow, too.
Even resetting all Preferences to defaults didn’t get rid of the yellow. The little window showing the chosen color is grey but the comments are still yellow.
This works in roughly the same fashion as inline annotations. If you change the colour of one of those, the next annotation you create will use the new colour. Likewise, each comment can have its own colour, and which colour is used for the next comment you make is based on the last on you changed. So if you want red comments, right-click on the comment and select “Red”. From now on future notes, even in other projects, will be red.