Use RGB constants in save files

src/save_failed_screen.c

@@ -13,6 +13,7 @@
 #include "starter_choose.h"
 #include "gba/flash_internal.h"
 #include "text_window.h"
+#include "constants/rgb.h"
 
 #define MSG_WIN_TOP 12
 #define CLOCK_WIN_TOP (MSG_WIN_TOP - 4)
@@ -235,7 +236,7 @@ static void CB2_SaveFailedScreen(void)
         CopyWindowToVram(gSaveFailedWindowIds[CLOCK_WIN_ID], 2); // again?
         CopyWindowToVram(gSaveFailedWindowIds[TEXT_WIN_ID], 1);
         SaveFailedScreenTextPrint(gText_SaveFailedCheckingBackup, 1, 0);
-        BeginNormalPaletteFade(0xFFFFFFFF, 0, 16, 0, 0);
+        BeginNormalPaletteFade(0xFFFFFFFF, 0, 16, 0, RGB_BLACK);
         EnableInterrupts(1);
         SetVBlankCallback(VBlankCB);
         SetGpuReg(REG_OFFSET_DISPCNT, DISPCNT_OBJ_ON | DISPCNT_OBJ_1D_MAP);