overlay settings - color of overlay for marker text

In Overlay Settings, is there any way to change the color of the text and the background behind the text for Markers? With Bottom Alignment marker text, I'm getting a dark blue background with black text, which is practically unreadable. It'd be terrific if the background was the color of the marker itself, and the text was a color that was easy to read based on the background color. I see it's slightly more readable at the top or on the right (blue text with a mostly transparent background) but still difficult to read.