diff --git a/src/Tools/DesignTools/Shading.gd b/src/Tools/DesignTools/Shading.gd
index d06bc1255..91a8d5ade 100644
--- a/src/Tools/DesignTools/Shading.gd
+++ b/src/Tools/DesignTools/Shading.gd
@@ -321,10 +321,12 @@ func update_brush() -> void:
 	$ColorInterpolation.visible = false
 
 
-func _check_palette_color(_color, mouse_button):
+func _check_palette_color(_color, mouse_button) -> void:
+	if mouse_button != tool_slot.button:
+		return
 	if _shading_mode == ShadingMode.COLOR_REPLACE:
 		await get_tree().process_frame
-		var index = Palettes.current_palette_get_selected_color_index(tool_slot.button)
+		var index = Palettes.current_palette_get_selected_color_index(mouse_button)
 		if index > -1:
 			$ColorReplaceOptions/Settings.visible = true
 			$ColorReplaceOptions/Label.visible = false
diff --git a/src/Tools/DesignTools/Shading.tscn b/src/Tools/DesignTools/Shading.tscn
index 78b5dad1d..852175aff 100644
--- a/src/Tools/DesignTools/Shading.tscn
+++ b/src/Tools/DesignTools/Shading.tscn
@@ -86,7 +86,7 @@ prefix = "Colors Right"
 
 [node name="Label" type="Label" parent="ColorReplaceOptions/Settings" index="1"]
 layout_mode = 2
-text = "(Darken -> Lighten)"
+text = "(Darken <--> Lighten)"
 
 [node name="Colors" type="HFlowContainer" parent="ColorReplaceOptions/Settings" index="2"]
 layout_mode = 2