Added custom border colors for the modify image nodes

src/PixiEditor.UI.Common/Accents/Base.axaml

@@ -47,6 +47,8 @@
             <Color x:Key="ColorSocketColor">#99e4aa</Color>
             <Color x:Key="VecDSocketColor">#c984ca</Color>
             <Color x:Key="VecISocketColor">#c9b4ca</Color>
+            
+            <Color x:Key="PixiEditorModifyImageNodeBorderColor">#68abdf</Color>
 
             <system:Double x:Key="ThemeDisabledOpacity">0.4</system:Double>
 
@@ -90,6 +92,9 @@
             <SolidColorBrush x:Key="ColorSocketBrush" Color="{StaticResource ColorSocketColor}"/>
             <SolidColorBrush x:Key="VecDSocketBrush" Color="{StaticResource VecDSocketColor}"/>
             <SolidColorBrush x:Key="VecISocketBrush" Color="{StaticResource VecISocketColor}"/>
+            
+            <SolidColorBrush x:Key="PixiEditorModifyImageLeftNodeBorderBrush" Color="{StaticResource PixiEditorModifyImageNodeBorderColor}"/>
+            <SolidColorBrush x:Key="PixiEditorModifyImageRightNodeBorderBrush" Color="{StaticResource PixiEditorModifyImageNodeBorderColor}"/>
 
             <CornerRadius x:Key="ControlCornerRadius">5</CornerRadius>
             <CornerRadius x:Key="ControlCornerRadiusTop">5, 5, 0, 0</CornerRadius>