I have a stack pane containing two buttons. The stack pane has style class "my-pane" and the two buttons have style classes "on" and "off". I am able to style these buttons with the following style sheet:

.my-pane .on {
-fx-text-fill: white;
}

.my-pane .off {
-fx-text-fill: white;
}


This should of course be equivalent to

.my-pane .on, .my-pane .off {
-fx-text-fill: white;
}

however, for some reason that syntax does not seem to work.