Adding options to Acrobat context menus

Hello. I would like to use JavaScript to add some options to a right-click context menu in Acrobat. Specifically, I would like to add a few color-selection choices at the top level of the context menu that appears when right-clicking on an annotation. I cannot for the life of me find the cName handle to use when modifying these menus... In my work we use color-coded annotations in our PDFs, and having to select "properties > color dropdown > color > OK" gets very old when you've got thousands of pages to review and maybe tens of thousands of annotations to alter (these can't simply be batched because a human judgment must be applied to each). And yes, I'm aware of the toolbar with the color option, but that also is more work than necessary, especially since it only appears to be available sometimes. Any help greatly appreciated. John