Qt BarChart下面每项的颜色怎么调整？这样该怎么办？

用蓝色笔打圈的位置就是需要改颜色的位置，他默认是透明，应该用什么方法修改呢？求解！
代码：

QBarSet* set0 = new QBarSet(QStringLiteral("语文一组"));
    QBarSet* set1 = new QBarSet(QStringLiteral("语文二组"));
    QBarSet* set2 = new QBarSet(QStringLiteral("语文三组"));
    QBarSet* set3 = new QBarSet(QStringLiteral("语文四组"));
    QBarSet* set4 = new QBarSet(QStringLiteral("语文五组"));
    QBarSet* set5 = new QBarSet(QStringLiteral("语文六组"));
    QBarSet* set6 = new QBarSet(QStringLiteral("语文七组"));
    QBarSet* set7 = new QBarSet(QStringLiteral("语文八组"));
    QBarSet* set8 = new QBarSet(QStringLiteral("语文九组"));
    *set0<<1<<2<<3<<4<<5;
    *set1<<5<<9<<2<<0<<3;
    *set2<<3<<7<<1<<4<<2;
    *set3<<6<<1<<9<<8<<3;
    *set4<<0<<2<<6<<8<<1;
    *set5<<4<<5<<7<<1<<4;
    *set6<<9<<1<<7<<2<<3;
    *set7<<3<<3<<4<<3<<0;
    *set8<<3<<2<<8<<2<<3;
    QBarSeries* barSerise = new QBarSeries();
    barSerise->append(set0);
    barSerise->append(set1);
    barSerise->append(set2);
    barSerise->append(set3);
    barSerise->append(set4);
    barSerise->append(set5);
    barSerise->append(set6);
    barSerise->append(set7);
    barSerise->append(set8);
    QChart* chart = new QChart();
    chart->addSeries(barSerise);
    chart->setTitle("语文小组最近5周数据统计表");
    chart->setAnimationOptions(QChart::SeriesAnimations);

    QStringList str;
    str<< "语文一组" << "语文二组" << "语文三组" << "语文四组" << "语文五组" << "语文六组" << "语文七组" << "语文八组" << "语文九组";
    QBarCategoryAxis* axisx = new QBarCategoryAxis();
    axisx->append(str);
    axisx->setLabelsColor(Qt::blue);
    chart->createDefaultAxes();
    chart->setAxisX(axisx);

    chart->legend()->setVisible(true);
    chart->legend()->setAlignment(Qt::AlignBottom);

    QChartView* chartView = new QChartView(chart);
    chartView->setRenderHint(QPainter::Antialiasing);

    ui->layout->setContentsMargins(0, 0, 0, 0);
    ui->layout->addWidget(chartView);

https://blog.csdn.net/weixin_34088598/article/details/93892777