qTox/themes/default/window/general.css

QToolTip
{
    /* explicit border width is required https://bugreports.qt.io/browse/QTBUG-41313 */
    border: 0px;
    color: black;
    background: #ffffdc;
}

QTabWidget
{
    background-color: white;
}

QTabBar::tab:selected 
{
    background: #2d3136;
    color: #f1f1f1;
}

QTabBar::tab:!selected 
{
    background: #d0d1d1;
    color: #5e5e5e;
}

QLabel
{
    color: @mainText;
}

QLineEdit
{
    color: @mainText;
}

QTextEdit
{
    color: @mainText;
}

QSpinBox, QDoubleSpinBox
{
    color: @mainText;
} 

QListView
{
    color: @mainText;
}