diff --git a/src/slic3r/GUI/Widgets/AMSControl.cpp b/src/slic3r/GUI/Widgets/AMSControl.cpp
index 1029589a4..863504159 100644
--- a/src/slic3r/GUI/Widgets/AMSControl.cpp
+++ b/src/slic3r/GUI/Widgets/AMSControl.cpp
@@ -474,7 +474,9 @@ void AMSextruder::doRender(wxDC& dc)
         dc.DrawRoundedRectangle(-size.x / 2, size.y * 0.1, size.x, size.y, 4);
 
         if (m_vams_loading) {
-            dc.SetPen(wxPen(m_current_colur, 6, wxSOLID));
+
+            if (m_current_colur.Alpha() == 0) { dc.SetPen(wxPen(*wxBLACK, 6, wxSOLID)); }
+            else { dc.SetPen(wxPen(m_current_colur, 6, wxSOLID)); }
             dc.DrawRoundedRectangle(-size.x / 2, size.y * 0.1, size.x, size.y, 4);
 
             if (m_current_colur == *wxWHITE && !wxGetApp().dark_mode()) {
@@ -485,7 +487,8 @@ void AMSextruder::doRender(wxDC& dc)
         }
 
         if (m_ams_loading && !m_none_ams_mode) {
-            dc.SetPen(wxPen(m_current_colur, 6, wxSOLID));
+            if (m_current_colur.Alpha() == 0) {dc.SetPen(wxPen(*wxBLACK, 6, wxSOLID));}
+            else {dc.SetPen(wxPen(m_current_colur, 6, wxSOLID));}
             dc.DrawLine(size.x / 2, -1, size.x / 2, size.y * 0.6 - 1);
 
             if (m_current_colur == *wxWHITE && !wxGetApp().dark_mode()) {
@@ -497,7 +500,8 @@ void AMSextruder::doRender(wxDC& dc)
     }
     else {
         if (m_ams_loading) {
-            dc.SetPen(wxPen(m_current_colur, 6, wxSOLID));
+            if (m_current_colur.Alpha() == 0) { dc.SetPen(wxPen(*wxBLACK, 6, wxSOLID)); }
+            else { dc.SetPen(wxPen(m_current_colur, 6, wxSOLID)); }
             dc.DrawLine(size.x / 2, -1, size.x / 2, size.y * 0.6 - 1);
 
             if (m_current_colur == *wxWHITE && !wxGetApp().dark_mode()) {
@@ -574,7 +578,8 @@ void AMSVirtualRoad::doRender(wxDC& dc)
 
     wxSize size = GetSize();
     if (m_vams_loading) {
-        dc.SetPen(wxPen(m_current_color, 6, wxSOLID));
+        if (m_current_color.Alpha() == 0) { dc.SetPen(wxPen(*wxBLACK, 6, wxSOLID)); }
+        else { dc.SetPen(wxPen(m_current_color, 6, wxSOLID)); }
     }
     else {
         dc.SetPen(wxPen(AMS_CONTROL_GRAY500, 2, wxSOLID));
@@ -1177,7 +1182,9 @@ void AMSRoad::doRender(wxDC &dc)
     // mode none
     // if (m_pass_rode_mode.size() == 1 && m_pass_rode_mode[0] == AMSPassRoadMode::AMS_ROAD_MODE_NONE) return;
 
-    dc.SetPen(wxPen(m_road_color, m_passroad_width, wxSOLID));
+    if (m_road_color.Alpha() == 0) {dc.SetPen(wxPen(*wxBLACK, m_passroad_width, wxSOLID));}
+    else {dc.SetPen(wxPen(m_road_color, m_passroad_width, wxSOLID));}
+    
     dc.SetBrush(wxBrush(*wxTRANSPARENT_BRUSH));
 
     // left pass mode