sarahrothery the color for this button is defined by the system, however, there's a workaround which might achieve your goal. If you export a copy of custom theme, edit the secondaryButton.textColor value, then import it back into the system, you'll...
@Stephen_Blather we checked the code and confirmed the 2H 2023 Release is applying the intended gray background defined by the Horizon design. The blue color was used by the previous theming generation but was also incorrectly applied on the 1H 2023 ...
@Julia_Gaskell thanks for raising this, and please create a Support ticket- I'm able to successfully select/unselect items in test. I'm also noticing that longer labels can present an issue, which we'll take a look at.
