How can I change the color of items in the legend when they are turned off? Right now I know how to do is change the color of a series, which then changes the color of the items on the legend (but only while they are not switched off). I also know how to permanently change the color of legend items, but I don't know how to choose the color that they change to when turned off.
Currently, this setting is not available via API directly, but you can use this workaround: