diff --git a/src/DialogToolkit.cpp b/src/DialogToolkit.cpp
index 979a1ce..940a5b1 100644
--- a/src/DialogToolkit.cpp
+++ b/src/DialogToolkit.cpp
@@ -713,7 +713,7 @@ std::tuple<float, float, float> openColorDialog( std::tuple<float, float, float>
 
 void DialogToolkit::ColorPickerDialog::open()
 {
-    if ( !busy_ && promises_.empty() ) {
+    if ( !DialogToolkit::ColorPickerDialog::busy_ && promises_.empty() ) {
         promises_.emplace_back( std::async(std::launch::async, openColorDialog, rgb_) );
         busy_ = true;
     }
diff --git a/src/DisplaysView.cpp b/src/DisplaysView.cpp
index f54624c..7e16570 100644
--- a/src/DisplaysView.cpp
+++ b/src/DisplaysView.cpp
@@ -30,6 +30,7 @@
 #include "ImGuiToolkit.h"
 #include "imgui_internal.h"
 
+#include "Log.h"
 #include "Mixer.h"
 #include "defines.h"
 #include "Source.h"
@@ -431,10 +432,15 @@ void DisplaysView::draw()
                                                            Settings::application.windows[1+current_window_].whitebalance.y,
                                                            Settings::application.windows[1+current_window_].whitebalance.z, 1.f),
                                    ImGuiColorEditFlags_NoAlpha)) {
-                whitebalancedialog.setRGB( std::make_tuple(Settings::application.windows[1+current_window_].whitebalance.x,
+                if ( DialogToolkit::ColorPickerDialog::busy()) {
+                    Log::Warning("Close previously openned color picker.");
+                }
+                else {
+                    whitebalancedialog.setRGB( std::make_tuple(Settings::application.windows[1+current_window_].whitebalance.x,
                                                            Settings::application.windows[1+current_window_].whitebalance.y,
                                                            Settings::application.windows[1+current_window_].whitebalance.z) );
-                whitebalancedialog.open();
+                    whitebalancedialog.open();
+                }
             }
             ImGui::PopFont();
 
diff --git a/src/ImGuiVisitor.cpp b/src/ImGuiVisitor.cpp
index 57fb89a..2c76a04 100644
--- a/src/ImGuiVisitor.cpp
+++ b/src/ImGuiVisitor.cpp
@@ -33,6 +33,7 @@
 #include "imgui.h"
 #include "imgui_internal.h"
 
+#include "Log.h"
 #include "defines.h"
 #include "Scene.h"
 #include "Primitives.h"
@@ -999,8 +1000,13 @@ void ImGuiVisitor::visit (AlphaFilter& f)
         ImGui::SameLine(0, IMGUI_SAME_LINE);
         ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
         if ( ImGui::Button( ICON_FA_EYE_DROPPER " Open selector", ImVec2(IMGUI_RIGHT_ALIGN, 0)) ){
-            colordialog.setRGB( std::make_tuple(color[0], color[1], color[2]) );
-            colordialog.open();
+            if ( DialogToolkit::ColorPickerDialog::busy()) {
+                Log::Warning("Close previously openned color picker.");
+            }
+            else {
+                colordialog.setRGB( std::make_tuple(color[0], color[1], color[2]) );
+                colordialog.open();
+            }
         }
         ImGui::SameLine(0, IMGUI_SAME_LINE);
         ImGui::Text("Color");