diff --git a/src/app/App.cpp b/src/app/App.cpp
index 164fa7b48..283cbcae4 100644
--- a/src/app/App.cpp
+++ b/src/app/App.cpp
@@ -68,6 +68,16 @@ inline bool installLocale (App &app, QTranslator &translator, const QLocale &loc
   return translator.load(locale, LANGUAGES_PATH) && app.installTranslator(&translator);
 }
 
+inline shared_ptr<linphone::Config> getConfigIfExists (const QCommandLineParser &parser) {
+  string configPath = Paths::getConfigFilePath(parser.value("config"), false);
+  if (Paths::filePathExists(configPath))
+    return linphone::Config::newWithFactory(configPath, "");
+
+  return nullptr;
+}
+
+// -----------------------------------------------------------------------------
+
 App::App (int &argc, char *argv[]) : SingleApplication(argc, argv, true, Mode::User | Mode::ExcludeAppPath | Mode::ExcludeAppVersion) {
   setWindowIcon(QIcon(WINDOW_ICON_PATH));
 
@@ -87,7 +97,7 @@ App::App (int &argc, char *argv[]) : SingleApplication(argc, argv, true, Mode::U
 
   // Init locale.
   mTranslator = new DefaultTranslator(this);
-  initLocale();
+  initLocale(::getConfigIfExists(*mParser));
 
   if (mParser->isSet("help")) {
     createParser();
@@ -175,6 +185,7 @@ void App::initContentApp () {
   mEngine->addImageProvider(ThumbnailProvider::PROVIDER_ID, new ThumbnailProvider());
 
   mColors = new Colors(this);
+  mColors->useConfig(::getConfigIfExists(*mParser));
 
   registerTypes();
   registerSharedTypes();
@@ -452,16 +463,11 @@ void App::setTrayIcon () {
 
 // -----------------------------------------------------------------------------
 
-void App::initLocale () {
+void App::initLocale (const shared_ptr<linphone::Config> &config) {
   // Try to use preferred locale.
   QString locale;
-  string configPath = Paths::getConfigFilePath(mParser->value("config"), false);
-  if (Paths::filePathExists(configPath))
-    locale = ::Utils::coreStringToAppString(
-        linphone::Config::newWithFactory(configPath, "")->getString(
-          SettingsModel::UI_SECTION, "locale", ""
-        )
-      );
+  if (config)
+    locale = ::Utils::coreStringToAppString(config->getString(SettingsModel::UI_SECTION, "locale", ""));
 
   if (!locale.isEmpty() && ::installLocale(*this, *mTranslator, QLocale(locale))) {
     mLocale = locale;
diff --git a/src/app/App.hpp b/src/app/App.hpp
index ca93868f0..9c0c04e8d 100644
--- a/src/app/App.hpp
+++ b/src/app/App.hpp
@@ -102,7 +102,7 @@ private:
   void setTrayIcon ();
   void createNotifier ();
 
-  void initLocale ();
+  void initLocale (const std::shared_ptr<linphone::Config> &config);
 
   QString getConfigLocale () const;
   void setConfigLocale (const QString &locale);
diff --git a/src/components/other/colors/Colors.cpp b/src/components/other/colors/Colors.cpp
index f0bbaf71b..fc62c1408 100644
--- a/src/components/other/colors/Colors.cpp
+++ b/src/components/other/colors/Colors.cpp
@@ -20,10 +20,10 @@
  *      Author: Ronan Abhamon
  */
 
+#include <linphone++/linphone.hh>
 #include <QMetaProperty>
 
 #include "../../../utils/Utils.hpp"
-#include "../../core/CoreManager.hpp"
 
 #include "Colors.hpp"
 
@@ -33,14 +33,15 @@ using namespace std;
 
 // =============================================================================
 
-Colors::Colors (QObject *parent) : QObject(parent) {
-  QObject::connect(CoreManager::getInstance(), &CoreManager::coreCreated, this, &Colors::overrideColors);
+Colors::Colors (QObject *parent) : QObject(parent) {}
+
+void Colors::useConfig (const std::shared_ptr<linphone::Config> &config) {
+  overrideColors(config);
 }
 
 // -----------------------------------------------------------------------------
 
-void Colors::overrideColors () {
-  shared_ptr<linphone::Config> config = CoreManager::getInstance()->getCore()->getConfig();
+void Colors::overrideColors (const shared_ptr<linphone::Config> &config) {
   const QMetaObject *info = metaObject();
 
   for (int i = info->propertyOffset(); i < info->propertyCount(); ++i) {
diff --git a/src/components/other/colors/Colors.hpp b/src/components/other/colors/Colors.hpp
index f7d3c3395..e2aadc138 100644
--- a/src/components/other/colors/Colors.hpp
+++ b/src/components/other/colors/Colors.hpp
@@ -47,6 +47,10 @@
 
 // -----------------------------------------------------------------------------
 
+namespace linphone {
+  class Config;
+}
+
 class Colors : public QObject {
   Q_OBJECT;
 
@@ -94,6 +98,8 @@ public:
   Colors (QObject *parent = Q_NULLPTR);
   ~Colors () = default;
 
+  void useConfig (const std::shared_ptr<linphone::Config> &config);
+
 signals:
   void colorTaChanged (const QColor &color);
   void colorTbChanged (const QColor &color);
@@ -125,7 +131,7 @@ signals:
   void colorTerrorChanged (const QColor &color);
 
 private:
-  void overrideColors ();
+  void overrideColors (const std::shared_ptr<linphone::Config> &config);
 
   QStringList getColorNames () const;
 };