How to change background color of QTableWidget horizontalHeaderItem?

[cutie.monkey]

Hi! I'm trying to change the background color of my QTableWidget horizontal header item but it's not working.

QTableWidgetItem *tblCol1 = new QTableWidgetItem("Column 1");
tblCol1->setBackground(Qt::red);
tableWidget->setHorizontalHeaderItem(0, tblCol1);

QTableWidgetItem *tblCol1 = new QTableWidgetItem("Column 1");
tblCol1->setBackground(Qt::red);
tableWidget->setHorizontalHeaderItem(0, tblCol1);

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Is there other way to do this?

thanks..