Two custom LAF functions can be used to manually redraw it.
laf.registerFunction("drawTableHeaderBackground", function(g, obj)
{
g.fillAll(Colours.black);
});
laf.registerFunction("drawTableHeaderColumn", function(g, obj)
{
var a = obj.area;
g.setColour(Colours.white);
g.drawAlignedText(obj.text, a, "centred");
});