civ14/Content.Client/Lobby/UI/HighlightedContainer.xaml

<PanelContainer
    xmlns="https://spacestation14.io"
    xmlns:graphics="clr-namespace:Robust.Client.Graphics;assembly=Robust.Client">
    <PanelContainer.PanelOverride>
        <graphics:StyleBoxFlat BackgroundColor="#2F2F35"
                               ContentMarginTopOverride="10"
                               ContentMarginBottomOverride="10"
                               ContentMarginLeftOverride="10"
                               ContentMarginRightOverride="10"/>
    </PanelContainer.PanelOverride>
</PanelContainer>