PrimaryBody and SecondaryBody colors for theme

For my project I am currently writing a style for RadioButton that is styled as a ChoiceChip (https://material.io/components/chips#choice-chips)
Currently I have the following result:

As you can see the light theme is nice, but unfortunately the foreground color of the dark theme does not have enough contrast.
The problem is that for light theme I need the foreground to be PrimaryHueDarkBrush, but for the dark theme it must be PrimaryHueLightBrush. (Same for Secondary)
I currently think the best way to achieve this is by introducing a PrimaryBody and SecondaryBody color to the theme. The naming because it reacts in a similar way as currently the MaterialDesignBody color does.

I am willing to look into creating a PR with the necessary changes if you also see this as a good solution. Otherwise I hope you can come up with a better solution to fix this issue.

Start by reviewing the existing theme color behavior for PrimaryHueDarkBrush, PrimaryHueLightBrush, Secondary colors, and MaterialDesignBody. Trace how a RadioButton styled as a ChoiceChip selects foreground colors in light and dark themes, then verify that the proposed PrimaryBody and SecondaryBody behavior provides sufficient contrast in both themes.