How to change the text background/fill on Map Chart labels?

When creating labels on marker layers for the Map Chart visualization, the labels appear as white text on a black, rectangular background. Is there a way to change the color of the background from black to another color? Or to remove the background altogether? 

For context, I have a marker layer with colored (red, yellow, blue, etc.) boxes labeled by names. Currently the colored boxes are center-labeled with the white text and black background (see attached image). I would like the colored boxes just to be labeled with white text and no black background.

Is there a way to do this? Via properties? Via some code?


Image icon label.png1.3 KB

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