GUIStyle style = new GUIStyle();style.normal = new GUIStyleState();style.normal.background = Texture2D.whiteTexture;Handles.Label(pos, "text", style); 참고[1] https://discussions.unity.com/t/can-i-set-a-solid-background-for-a-gui-label/217763/3[2] https://docs.unity3d.com/ScriptReference/GUIStyleState.html