Thanks. I tried a new map (OpenStreetMap) and had a similar problem.
I think i understand better what's happening. I'm mapping countries with colors and the color is overlaid on top of the map, so the country name looks washed out.
Is there a way to rearrange the layers such that the maps' label is above the color?
You can try using a Mapbox map:
In the image below, I used the map in the Classic group called "High Contrast".
Here, the color opacity was set to 80%, but you could probably decrease that some.