Slices color based on value

Hi,

I've got multiple pie charts in my report, and all the reports contain the same values.

But accross the different pie charts the same value have different colors.

I can manuly change the colors but when the report gets updated and some values dont show up in the pie chart the color chages again.

This is how it looks now.

Is there a way to have fixed colors based on the value? i can easly add a collor code to my table of values.