qTox/ui/settings/mainContent.css

QCheckBox
{
    color: black;
}

QLabel
{
    color: black;
}

QGroupBox::title
{
    color: black;
}

QGroupBox
{
    background-color: white;    
}

QWidget
{
    color: black;
    background-color: white;
}

QComboBox
{
    background-color: white;
}

QComboBox:on QComboBox:off QComboBox:drop-down
{
    background: rgba(18, 18, 18, 204);
}

QComboBox:active
{
    background: white;
}