How to find the glance background color?

On my Fenix 7S Pro, the glance background color is black. On my Edge 840, it's white during day time and black at night. On that device, during daytime, I can't read the text I write on the widget wheel as it's white, so white on white. Is there a way to find the background color of the glance so I can adjust the text color accordingly?

Edit: Replaced 'widget wheel' for glance as it's the term used. I added dc.setColor(Gfx.COLOR_WHITE, Gfx.COLOR_BLACK);dc.clear();  which changes the background color of the glance to black. It looks ugly on white background but at least, I can read something now lol.