Improve connection line contrast

src/PixiEditor.AvaloniaUI/Styles/Templates/ConnectionView.axaml

@@ -13,8 +13,10 @@
                         <nodes:ConnectionLine.LineBrush>
                             <LinearGradientBrush>
                                 <LinearGradientBrush.GradientStops>
-                                    <GradientStop Offset="0" Color="{Binding InputProperty.SocketBrush.Color, RelativeSource={RelativeSource TemplatedParent}}" />
-                                    <GradientStop Offset="1" Color="{Binding OutputProperty.SocketBrush.Color, RelativeSource={RelativeSource TemplatedParent}}" />
+                                    <GradientStop Offset="0" Color="#555" />
+                                    <GradientStop Offset=".05" Color="{Binding InputProperty.SocketBrush.Color, RelativeSource={RelativeSource TemplatedParent}}" />
+                                    <GradientStop Offset="0.95" Color="{Binding OutputProperty.SocketBrush.Color, RelativeSource={RelativeSource TemplatedParent}}" />
+                                    <GradientStop Offset="1" Color="#555" />
                                 </LinearGradientBrush.GradientStops>
                             </LinearGradientBrush>
                         </nodes:ConnectionLine.LineBrush>