diff --git a/src/gtk/clrpicker.cpp b/src/gtk/clrpicker.cpp
index 14cff5db3e..16754db196 100644
--- a/src/gtk/clrpicker.cpp
+++ b/src/gtk/clrpicker.cpp
@@ -36,9 +36,14 @@ static void gtk_clrbutton_setcolor_callback(GtkColorButton *widget,
 {
     // update the m_colour member of the wxColourButton
     wxASSERT(p);
-#ifdef __WXGTK3__
+#ifdef __WXGTK4__
+    GdkRGBA gdkColor;
+    gtk_color_chooser_get_rgba(GTK_COLOR_CHOOSER(widget), &gdkColor);
+#elif defined(__WXGTK3__)
+    wxGCC_WARNING_SUPPRESS(deprecated-declarations)
     GdkRGBA gdkColor;
     gtk_color_button_get_rgba(widget, &gdkColor);
+    wxGCC_WARNING_RESTORE()
 #else
     GdkColor gdkColor;
     gtk_color_button_get_color(widget, &gdkColor);
@@ -100,8 +105,12 @@ wxColourButton::~wxColourButton()
 
 void wxColourButton::UpdateColour()
 {
-#ifdef __WXGTK3__
+#ifdef __WXGTK4__
+    gtk_color_chooser_set_rgba(GTK_COLOR_CHOOSER(m_widget), m_colour);
+#elif defined(__WXGTK3__)
+    wxGCC_WARNING_SUPPRESS(deprecated-declarations)
     gtk_color_button_set_rgba(GTK_COLOR_BUTTON(m_widget), m_colour);
+    wxGCC_WARNING_RESTORE()
 #else
     gtk_color_button_set_color(GTK_COLOR_BUTTON(m_widget), m_colour.GetColor());
 #endif