diff --git a/platform/win32/contiki-conf.h b/platform/win32/contiki-conf.h
index 1d483945c..82ea56474 100644
--- a/platform/win32/contiki-conf.h
+++ b/platform/win32/contiki-conf.h
@@ -116,27 +116,29 @@ typedef unsigned short uip_stats_t;
 #define CTK_CONF_MENUS            0
 #endif /* PLATFORM_BUILD */
 
-#define COLOR_BLACK  (0)
-#define COLOR_BLUE   (1)
-#define COLOR_GRAY   (1 | 2 | 4)
-#define COLOR_CYAN   (1 | 2 | 8)
-#define COLOR_YELLOW (2 | 4 | 8)
-#define COLOR_WHITE  (1 | 2 | 4 | 8)
+#define CTK_COLOR_BLACK  (0)
+#define CTK_COLOR_BLUE   (1)
+#define CTK_COLOR_GRAY   (1 | 2 | 4)
+#define CTK_COLOR_CYAN   (1 | 2 | 8)
+#define CTK_COLOR_YELLOW (2 | 4 | 8)
+#define CTK_COLOR_WHITE  (1 | 2 | 4 | 8)
 
-#define BORDERCOLOR         COLOR_BLACK
-#define SCREENCOLOR         COLOR_BLACK
-#define BACKGROUNDCOLOR     COLOR_BLACK
-#define WINDOWCOLOR_FOCUS   COLOR_WHITE  | COLOR_BLUE * 0x10
-#define WINDOWCOLOR         COLOR_GRAY   | COLOR_BLUE * 0x10
-#define DIALOGCOLOR         COLOR_WHITE  | COLOR_BLUE * 0x10
-#define WIDGETCOLOR_HLINK   COLOR_CYAN   | COLOR_BLUE * 0x10
-#define WIDGETCOLOR_FWIN    COLOR_WHITE  | COLOR_BLUE * 0x10
-#define WIDGETCOLOR         COLOR_GRAY   | COLOR_BLUE * 0x10
-#define WIDGETCOLOR_DIALOG  COLOR_WHITE  | COLOR_BLUE * 0x10
-#define WIDGETCOLOR_FOCUS   COLOR_YELLOW | COLOR_BLUE * 0x10
-#define MENUCOLOR           COLOR_WHITE  | COLOR_BLUE * 0x10
-#define OPENMENUCOLOR       COLOR_WHITE  | COLOR_BLUE * 0x10
-#define ACTIVEMENUITEMCOLOR COLOR_YELLOW | COLOR_BLUE * 0x10
+#define COLOR_BG CTK_COLOR_BLUE
+
+#define BORDERCOLOR         CTK_COLOR_BLACK
+#define SCREENCOLOR         CTK_COLOR_BLACK
+#define BACKGROUNDCOLOR     CTK_COLOR_BLACK
+#define WINDOWCOLOR_FOCUS   CTK_COLOR_WHITE  | COLOR_BG * 0x10
+#define WINDOWCOLOR         CTK_COLOR_GRAY   | COLOR_BG * 0x10
+#define DIALOGCOLOR         CTK_COLOR_WHITE  | COLOR_BG * 0x10
+#define WIDGETCOLOR_HLINK   CTK_COLOR_CYAN   | COLOR_BG * 0x10
+#define WIDGETCOLOR_FWIN    CTK_COLOR_WHITE  | COLOR_BG * 0x10
+#define WIDGETCOLOR         CTK_COLOR_GRAY   | COLOR_BG * 0x10
+#define WIDGETCOLOR_DIALOG  CTK_COLOR_WHITE  | COLOR_BG * 0x10
+#define WIDGETCOLOR_FOCUS   CTK_COLOR_YELLOW | COLOR_BG * 0x10
+#define MENUCOLOR           CTK_COLOR_WHITE  | COLOR_BG * 0x10
+#define OPENMENUCOLOR       CTK_COLOR_WHITE  | COLOR_BG * 0x10
+#define ACTIVEMENUITEMCOLOR CTK_COLOR_YELLOW | COLOR_BG * 0x10
 
 
 #ifdef PLATFORM_BUILD