+            wxColour colour = wxRGBToColour(themeColor);
+
+            // Under Vista, the tab background colour is reported incorrectly.
+            // So for the default theme at least, hard-code the colour to something
+            // that will blend in.
+
+            static int s_AeroStatus = -1;
+            if (s_AeroStatus == -1)
+            {
+                WCHAR szwThemeFile[1024];
+                WCHAR szwThemeColor[256];
+                if (S_OK == wxUxThemeEngine::Get()->GetCurrentThemeName(szwThemeFile, 1024, szwThemeColor, 256, NULL, 0))
+                {
+                    wxString themeFile(szwThemeFile), themeColor(szwThemeColor);
+                    if (themeFile.Find(wxT("Aero")) != -1 && themeColor == wxT("NormalColor"))
+                        s_AeroStatus = 1;
+                    else
+                        s_AeroStatus = 0;
+                }
+                else
+                    s_AeroStatus = 0;
+            }
+
+            if (s_AeroStatus == 1)
+                colour = wxColour(255, 255, 255);
+
+            return colour;