code: private void highlightSlice(PieModel _Slice) {
  
          int color = _Slice.getColor();
          _Slice.setHighlightedColor(Color.argb(
                  0xff,
                  Math.min((int) (mHighlightStrength * (float) Color.red(color)), 0xff),
                  Math.min((int) (mHighlightStrength * (float) Color.green(color)), 0xff),
                  Math.min((int) (mHighlightStrength * (float) Color.blue(color)), 0xff)
          ));
      }
docs: Calculate the highlight color. Saturate at 0xff to make sure that high values
  don't result in aliasing.
  
  @param _Slice The Slice which will be highlighted.