+#if defined(DCPOMATIC_OSX) && wxCHECK_VERSION(3, 1, 0)
+ auto appearance = wxSystemSettings::GetAppearance();
+ auto dark = appearance.IsDark();
+#else
+ auto dark = false;
+#endif
+
+ auto const pad_colour = (_viewer->pad_black() || dark) ? wxColour(0, 0, 0) : wxColour(240, 240, 240);
+