Question

How can I set text color of all Fields to white?

Answer 1

AFAIK, there is no such option in BB API. You can only override Field.paint(Grahpics grahpics), smth like this:

...
public void paint(Grahpics grahpics) {
    int initialColor = grahpics.getColor(); // just in case
    grahpics.setColor(Color.WHITE);
    super.paint(grahpics);
    grahpics.setColor(initialColor);
}
...

So you could create a set of custom white-colored Fields (WhiteLabelField, WhiteEditField, etc.) and use them istead of the originals.