Consider to store the colors when triggered on open and somehow use nother trigger on close of the sidebar or equivalent to paint the cells back to previous colors so that they dont interfere with users sheets. Maybe use it as an onOpen trigger if nothing else and warn users that the extension may modify the underlying sheets, or something similar. Requires extensive thought and experimentation, but overall this is a low priority.
Consider to store the colors when triggered on open and somehow use nother trigger on close of the sidebar or equivalent to paint the cells back to previous colors so that they dont interfere with users sheets. Maybe use it as an onOpen trigger if nothing else and warn users that the extension may modify the underlying sheets, or something similar. Requires extensive thought and experimentation, but overall this is a low priority.