The dark and light theme both have the same styling on this control:
You can’t see the mouse pointer because this was screen captured. It’s over the “Highlight” label.
You can get this from the usual place: https://www.dropbox.com/sh/xvx1w4535x1mjm6/ntbCK7PP9z
If you dig into the css code you’ll see that there’s also a commented out implementation of the tooltip control. Unfortunately JavaFX CSS for this control is currently faulty, so we’ll have to wait for another release of JavaFX to fix this.
One last note: if you haven’t submitted the survey to put JavaFX on mobile and tables, please do so here: http://fxexperience.com/2012/12/javafx-for-tablets-mobile/ . It will take you less than 5min and can make the difference between it actually happening or not.