which is unreadable. I would prefer it to be the same color as non-clicked (black)

CSS which apply is plugins/core-ui/resources/themes/theme-ametys-cms/theme-ametys-cms-all-debug_6.css:1948

For instance, for the widget edition.select-content. Click on a Content, then click elsewhere to lose focus. The text remains white (see screenshot).

Another example is for initial sorts widget in new search service (click to change order)