diff --git a/src/slic3r/GUI/AMSMaterialsSetting.cpp b/src/slic3r/GUI/AMSMaterialsSetting.cpp
index 368a9d78b..b0f0a74f8 100644
--- a/src/slic3r/GUI/AMSMaterialsSetting.cpp
+++ b/src/slic3r/GUI/AMSMaterialsSetting.cpp
@@ -1462,7 +1462,7 @@ void ColorPickerPopup::on_custom_clr_picker(wxMouseEvent& event)
             m_clrData->GetColour().Red(),
             m_clrData->GetColour().Green(),
             m_clrData->GetColour().Blue(),
-            254
+            255
         );
 
         if (picker_color.Alpha() == 0) {
diff --git a/src/slic3r/GUI/AmsMappingPopup.cpp b/src/slic3r/GUI/AmsMappingPopup.cpp
index cf3087d8a..b9efc1928 100644
--- a/src/slic3r/GUI/AmsMappingPopup.cpp
+++ b/src/slic3r/GUI/AmsMappingPopup.cpp
@@ -140,14 +140,11 @@ void MaterialItem::render(wxDC &dc)
 
     auto mcolor = m_material_coloul;
     auto acolor = m_ams_coloul;
+    change_the_opacity(acolor);
     if (!IsEnabled()) {
         mcolor = wxColour(0x90, 0x90, 0x90);
         acolor = wxColour(0x90, 0x90, 0x90);
     }
-    else {
-        mcolor = m_material_coloul;
-        acolor = m_ams_coloul;
-    }
 
     // materials name
     dc.SetFont(::Label::Body_13);
@@ -185,6 +182,7 @@ void MaterialItem::doRender(wxDC &dc)
 {
     auto mcolor = m_material_coloul;
     auto acolor = m_ams_coloul;
+    change_the_opacity(acolor);
 
     if (mcolor.Alpha() == 0 || acolor.Alpha() == 0) {
         dc.DrawBitmap(m_transparent_mitem.bmp(), FromDIP(1), FromDIP(1));
@@ -194,10 +192,6 @@ void MaterialItem::doRender(wxDC &dc)
         mcolor = wxColour(0x90, 0x90, 0x90);
         acolor = wxColour(0x90, 0x90, 0x90);
     }
-    else {
-        mcolor = m_material_coloul;
-        acolor = m_ams_coloul;
-    }
 
     //top
     dc.SetPen(*wxTRANSPARENT_PEN);
@@ -518,7 +512,7 @@ void AmsMapingPopup::add_ams_mapping(std::vector<TrayData> tray_data, wxWindow*
         m_mapping_item_list.push_back(m_mapping_item);
 
         if (tray_data[i].type == NORMAL) {
-            if (is_match_material(tray_data[i].filament_type)) { 
+            if (is_match_material(tray_data[i].filament_type)) {
                 m_mapping_item->set_data(tray_data[i].colour, tray_data[i].name, tray_data[i]);
             } else {
                 m_mapping_item->set_data(wxColour(0xEE,0xEE,0xEE), tray_data[i].name, tray_data[i], true);
@@ -673,10 +667,13 @@ void MappingItem::set_data(wxColour colour, wxString name, TrayData data, bool u
 
 void MappingItem::doRender(wxDC &dc)
 {
-    dc.SetPen(m_coloul);
-    dc.SetBrush(wxBrush(m_coloul));
+    wxColour color = m_coloul;
+    change_the_opacity(color);
 
-    if (m_coloul.Alpha() == 0) {
+    dc.SetPen(color);
+    dc.SetBrush(wxBrush(color));
+
+    if (color.Alpha() == 0) {
        dc.DrawBitmap( m_transparent_mapping_item.bmp(), 0, (GetSize().y - MAPPING_ITEM_REAL_SIZE.y) / 2);
     }
     else {
diff --git a/src/slic3r/GUI/DeviceManager.cpp b/src/slic3r/GUI/DeviceManager.cpp
index 176ef7b40..7682d36a1 100644
--- a/src/slic3r/GUI/DeviceManager.cpp
+++ b/src/slic3r/GUI/DeviceManager.cpp
@@ -5677,4 +5677,10 @@ std::string DeviceManager::load_gcode(std::string type_str, std::string gcode_fi
     return "";
 }
 
+void change_the_opacity(wxColour& colour)
+{
+    if (colour.Alpha() == 255) {
+        colour = wxColour(colour.Red(), colour.Green(), colour.Blue(), 254);
+    }
+}
 } // namespace Slic3r
diff --git a/src/slic3r/GUI/DeviceManager.hpp b/src/slic3r/GUI/DeviceManager.hpp
index 0c7ea98d0..10c1e8bf3 100644
--- a/src/slic3r/GUI/DeviceManager.hpp
+++ b/src/slic3r/GUI/DeviceManager.hpp
@@ -1034,6 +1034,8 @@ public:
     static std::string load_gcode(std::string type_str, std::string gcode_file);
 };
 
+// change the opacity
+void change_the_opacity(wxColour& colour);
 } // namespace Slic3r
 
 #endif //  slic3r_DeviceManager_hpp_
diff --git a/src/slic3r/GUI/Widgets/AMSControl.cpp b/src/slic3r/GUI/Widgets/AMSControl.cpp
index 83456c475..6f00c3297 100644
--- a/src/slic3r/GUI/Widgets/AMSControl.cpp
+++ b/src/slic3r/GUI/Widgets/AMSControl.cpp
@@ -756,6 +756,8 @@ void AMSLib::render(wxDC &dc)
 void AMSLib::render_extra_text(wxDC& dc)
 {
     auto tmp_lib_colour = m_info.material_colour;
+
+    change_the_opacity(tmp_lib_colour);
     auto temp_text_colour = AMS_CONTROL_GRAY800;
 
     if (tmp_lib_colour.GetLuminance() < 0.6) {
@@ -843,6 +845,8 @@ void AMSLib::render_generic_text(wxDC &dc)
     }
 
     auto tmp_lib_colour = m_info.material_colour;
+    change_the_opacity(tmp_lib_colour);
+
     auto temp_text_colour = AMS_CONTROL_GRAY800;
 
     if (tmp_lib_colour.GetLuminance() < 0.6) {
@@ -977,6 +981,8 @@ void AMSLib::render_extra_lib(wxDC& dc)
 
 
     auto   tmp_lib_colour    = m_info.material_colour;
+    change_the_opacity(tmp_lib_colour);
+
     auto   temp_bitmap_third = m_bitmap_editable_light;
     auto   temp_bitmap_brand = m_bitmap_readonly_light;
 
@@ -1078,6 +1084,8 @@ void AMSLib::render_generic_lib(wxDC &dc)
 {
     wxSize size = GetSize();
     auto   tmp_lib_colour = m_info.material_colour;
+    change_the_opacity(tmp_lib_colour);
+
     auto   temp_bitmap_third = m_bitmap_editable_light;
     auto   temp_bitmap_brand = m_bitmap_readonly_light;
 
@@ -1741,7 +1749,9 @@ void AMSItem::doRender(wxDC &dc)
         dc.SetPen(wxPen(*wxTRANSPARENT_PEN));
 
         if (wxWindow::IsEnabled()) {
-            dc.SetBrush(wxBrush(iter->material_colour));
+            wxColour color = iter->material_colour;
+            change_the_opacity(color);
+            dc.SetBrush(wxBrush(color));
         } else {
             dc.SetBrush(AMS_CONTROL_DISABLE_COLOUR);
         }