Slicer - change selected item background and font

Hi,

I have slicer in a report, and want to change the color of selected items and color font.

for example: default color is white and font is black. when i select a item to slice by, it will change to blue and font in white.

1. I tried with JSON file and didnt success. it didnt change anything in the slicer. maybe somebody already try it and it worked for him ?

2. I tried to download ChicketSlicer BUT couldnt change to font color of selected item. in addition, it takes a couple of minutes until the slicer appear on the server. maybe somebody know why?

Thanks a lot