I am trying to create a pie graph in ExtJS 4.2.2.1144 (3rd party product that I have no control over). I need to set custom colors to my pie slices, which works as needed. However, the legend does not match. How do I fix it so that the legend uses those same custom colors as the pie slices?

I am trying to create a pie graph in ExtJS 4.2.2.1144 (3rd party product that I have no control over). I need to set custom colors to my pie slices, which works as needed. However, the legend does not match. How do I fix it so that the legend uses those same custom colors as the pie slices?