Plotting values on US map

Hello all,

I am using "Shape Map" to show metric values on a US map. I am showing opportunities in terms of values (10,5 and 0). This works perfectly fine. See below:

When I use a slicer value (say product "A") , then based on the report logic there are no opportunites or in other words opportunity=0.  I get the below map - which is all pink in color. My requirement is to get "Grey" color in the map as the opportunity=0. I tried few things in data values options but am unable to get the required results. Any suggestions?