Select (or keep default) text color in pie chart labels against background
In Pie charts, for some reason the data label formatting is very limited versus other charts, so there's no way to control the background colour on data labels. Furthermore, if any bespoke colour is chosen, this is then applied to all data labels in the chart, even where (by default) the text is ordinarily reversed out (i.e. white vs. the dark label background).
I would suggest either improving the options available for data label formatting in Pie charts, or at least make the data labels reversing out of the dark data label background a fixed standard (i.e. agnostic of the 'main' data label text color chosen [for 'plain' data label]). As few colours work against such a dark background.