Style Separator.
ADD
WalletWasabi.Fluent/Styles/Separator.axaml
+<Styles xmlns="https://github.com/avaloniaui"
+ xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+ <Design.PreviewWith>
+ <Border Padding="20" MinWidth="200">
+ <!-- Add Controls for Previewer Here -->
+ <Separator />
+ </Border>
+ </Design.PreviewWith>
+
+ <Style Selector="Separator">
+ <Setter Property="Height" Value="0.55" />
+ <Setter Property="Background" Value="{DynamicResource SeparatorBackgroundBrush}" />
+ </Style>
+</Styles>

MODIFY
WalletWasabi.Fluent/Styles/Styles.axaml
WalletWasabi.Fluent/Styles/Styles.axaml
<StyleInclude Source="avares://WalletWasabi.Fluent/Styles/Label.axaml" />
<StyleInclude Source="avares://WalletWasabi.Fluent/Styles/OptionButton.axaml" />
<StyleInclude Source="avares://WalletWasabi.Fluent/Styles/PlainButton.axaml" />
+ <StyleInclude Source="avares://WalletWasabi.Fluent/Styles/Separator.axaml" />
<StyleInclude Source="avares://WalletWasabi.Fluent/Styles/SplitView.axaml" />
<StyleInclude Source="avares://WalletWasabi.Fluent/Styles/TextBox.axaml" />
<StyleInclude Source="avares://WalletWasabi.Fluent/Styles/HyperlinkButton.axaml" />

MODIFY
WalletWasabi.Fluent/Styles/Themes/BaseDark.axaml
WalletWasabi.Fluent/Styles/Themes/BaseDark.axaml
<SolidColorBrush x:Key="DialogOverlayColor">#7F2E2E2E</SolidColorBrush>
<BoxShadows x:Key="DialogBoxShadow">4 11 30 1 #3F000000</BoxShadows>
+ <SolidColorBrush x:Key="SeparatorBackgroundBrush">#7FFFFFFF</SolidColorBrush>
+
<SolidColorBrush x:Key="TagsBoxControlForeground">#7FFFFFFF</SolidColorBrush>
<Color x:Key="RegionColor">#FF212121</Color>

MODIFY
WalletWasabi.Fluent/Styles/Themes/BaseLight.axaml
WalletWasabi.Fluent/Styles/Themes/BaseLight.axaml
<SolidColorBrush x:Key="DialogOverlayColor">#7F7A7A7A</SolidColorBrush>
<BoxShadows x:Key="DialogBoxShadow">4 11 30 1 #3F000000</BoxShadows>
+ <SolidColorBrush x:Key="SeperatorBackgroundBrush">#7F000000</SolidColorBrush>
+
<SolidColorBrush x:Key="TagsBoxControlForeground">#7F000000</SolidColorBrush>
<Color x:Key="RegionColor">#FFFAFAFA</Color>

Style Separator.