Pie chart colors for top and other

I am using some pie charts on my dashboards and one thing is very disturbing - when using “other” for summary of the rest it has always the same color as the top one. On smaller charts it is impossible to even see the line between them and can’t identifiy which one is which without hovering mouse over it and that’s not the best way for always-on dashboards on an infoscreen.
Is there any possibility to modify colors/patterns on pie chart? or get labels on the chart?