diff --git a/Source/UI/Dialogs/UINormalMB.cpp b/Source/UI/Dialogs/UINormalMB.cpp
index dc9f7d0e4..c4863d12d 100644
--- a/Source/UI/Dialogs/UINormalMB.cpp
+++ b/Source/UI/Dialogs/UINormalMB.cpp
@@ -102,8 +102,7 @@ void UINormalMB::Create(UIWindow* owner, const char* text, int type, bool defaul
   this->m_viewer->Configure(inset + 10, 22, width - inset - 20, height - 55, 0);
   unsigned red, green, blue;
   SkinPaletteChannels(ResourceMgr::Instance(), 2, 2, red, green, blue);
-  this->m_viewer->backgroundColor = RGB(red, green, blue) | 0xFF000000u;
-  this->m_viewer->Invalidate();
+  this->m_viewer->SetBackgroundColor(RGB(red, green, blue) | 0xFF000000u);
   this->AddChild(this->m_viewer);
   this->m_viewer->SendMsg(nullptr, UM_SETTEXT, reinterpret_cast<std::intptr_t>(this->m_message.c_str()), static_cast<int>(width / 7.5), 0, 0);
 
diff --git a/Source/UI/EntryQueue/UIEntryQueueWnd.cpp b/Source/UI/EntryQueue/UIEntryQueueWnd.cpp
index 0e0d33b16..51a7ece29 100644
--- a/Source/UI/EntryQueue/UIEntryQueueWnd.cpp
+++ b/Source/UI/EntryQueue/UIEntryQueueWnd.cpp
@@ -254,8 +254,7 @@ bool UIEntryQueueStandByWnd::Create() {
   this->m_viewer->Configure(10, 22, 260, 65, 0);
   unsigned red, green, blue;
   SkinPaletteChannels(ResourceMgr::Instance(), 2, 2, red, green, blue);
-  this->m_viewer->backgroundColor = 0xFF000000u | (blue << 16) | (green << 8) | red;
-  this->m_viewer->Invalidate();
+  this->m_viewer->SetBackgroundColor(0xFF000000u | RGB(red, green, blue));
   this->AddChild(this->m_viewer);
 
   const std::string path = "유저인터페이스\\";
diff --git a/Source/UI/Guild/UIGuildHelperWnd.cpp b/Source/UI/Guild/UIGuildHelperWnd.cpp
index 56134783c..b1ea6765c 100644
--- a/Source/UI/Guild/UIGuildHelperWnd.cpp
+++ b/Source/UI/Guild/UIGuildHelperWnd.cpp
@@ -400,8 +400,7 @@ void UIGuildTipWnd::OnCreate(int width, int height) {
   unsigned int green;
   unsigned int blue;
   SkinPaletteChannels(ResourceMgr::Instance(), 2, 2, red, green, blue);
-  this->m_textViewer->backgroundColor = 0xFF000000 | RGB(red, green, blue);
-  this->m_textViewer->Invalidate();
+  this->m_textViewer->SetBackgroundColor(0xFF000000 | RGB(red, green, blue));
   this->AddChild(this->m_textViewer);
 
   if (!g_guildTip.m_bTryLoading) {