How to change the font color for the synopsis section in the Inspector.

macOS: Mojave 10.14.5
Scrivener 3: Version 3.1.3(11945)_Dark Mode

In the Preferences>Appearance>Index Cards,
the “Index Cards” font is the one that controls the synopsis font for the cards in the inspector.

But there is no option to adjust the font color.
As you can see in the picture below, I changed the text of the scrivener to black in dark mode.
However, the font color for the synopsis section in the Inspector is fixed in white and not adjustable.
If there’s a solution to change the font color for the synopsis section in the Inspector, I’d like to know about this.
If it is impossible to change the font color for the synopsis section in dark mode,
please update it so that it can be possible in the future.

The synopsis text colour cannot be set in either light or dark modes. The problem is that the software uses three slightly different shades of grey to indicate different types of synopsis/preview text, in the outliner and corkboard (not in the inspector though). So instead it uses the basic black/white toggle that happens based on the background colour you set.

It looks like in this case you have chosen a level of background grey that is straddling the line between what triggers light text vs dark text. So the only solution is to adjust the background grey just a bit, so that the synopsis text turns black. You would then probably want to match this grey in the other views, given the overall look of your screenshot.