UnityPanelWidget,
.unity-panel {
    border-width: 0 0 1px 0;
    border-style: solid;
    border-color: @panel_bg_color;
    background-image: none;
    background-color: @panel_bg_color;
    color: @panel_fg_color;
}

.unity-panel.panel,
.unity-panel .panel {
}

.unity-panel.menuitem,
.unity-panel .menuitem {
    border-width: 0 1px;
    color: @panel_fg_color;
}

.unity-panel.panel.menuitem:hover,
.unity-panel.panel .menuitem *:hover {
    border-color: mix(@panel_bg_color, @theme_bg_color, 0.23);
    background-image: none;
    background-color: mix(@panel_bg_color, @theme_bg_color, 0.21);
    color: mix(@panel_fg_color, @theme_base_color, 0.8);
}