diff --git a/single-line-diagram-core/src/main/java/com/powsybl/sld/util/TopologicalStyleProvider.java b/single-line-diagram-core/src/main/java/com/powsybl/sld/util/TopologicalStyleProvider.java
index f867945b7..216c4da5d 100644
--- a/single-line-diagram-core/src/main/java/com/powsybl/sld/util/TopologicalStyleProvider.java
+++ b/single-line-diagram-core/src/main/java/com/powsybl/sld/util/TopologicalStyleProvider.java
@@ -149,6 +149,18 @@ private RGBColor getSmartNodeColor(VoltageLevelInfos voltageLevelInfos, Node nod
         return null;
     }
 
+    @Override
+    protected String getEdgeColor(Node node1, Node node2) {
+        if (node1.getType() == NodeType.SWITCH && node1.isOpen()) {
+            return node2.getVoltageLevelInfos() != null ? getNodeColor(node2.getVoltageLevelInfos(), node2) : null;
+        }
+        if (node2.getType() == NodeType.SWITCH && node2.isOpen()) {
+            return node1.getVoltageLevelInfos() != null ? getNodeColor(node1.getVoltageLevelInfos(), node1) : null;
+        }
+
+        return super.getEdgeColor(node1, node2);
+    }
+
     @Override
     public String getNodeColor(VoltageLevelInfos voltageLevelInfos, Node node) {
         RGBColor rgbColor = getSmartNodeColor(voltageLevelInfos, node);