<SOLVED>Set background color for toolButton

[GrahamL]

Hi
I am trying to set the background colour for a checkable QToolButton -
@
void test2::on_toolButton_clicked()
{
if (!ui.toolButton->isChecked())
{
ui.toolButton->setStyleSheet("background-color: green");
}
else
{
ui.toolButton->setStyleSheet("background-color: red");
}
}
@

First time this gets called the color is solid green
The next time the color gets set to red, but it not solid, it seems to be cross hatched with white

Can anyone tell me why this might happen?

Thanks

[GrahamL]

I need to specify border: none