Set transaparent background
MODIFY
WalletWasabi.Gui/Controls/WalletExplorer/WalletExplorerView.xaml
WalletWasabi.Gui/Controls/WalletExplorer/WalletExplorerView.xaml
<Style Selector="TreeViewItem">
<Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" />
</Style>
+ <Style Selector="TreeViewItem:selected /template/ Border#SelectionBorder">
+ <Setter Property="Background" Value="Transparent"/>
+ </Style>
</TreeView.Styles>
<TreeView.DataTemplates>
<TreeDataTemplate DataType="ViewModels:WalletViewModel" ItemsSource="{Binding Actions}">

Set transaparent background