[RESOLVED]Memorizing Map's Screen Color Tone?

I want to be able to have a common event that fades the screen out, then does what I need it to, and then fade the screen back to what it' color tone originally was...

 - The only reason that I'm experiencing this problem, is becuase I want the common event to be able to be called ANYWHERE, and so I can't have a constant color tone, because my maps color tones are ALWAYS varying...

Erm... The normal thing is just color tone and then don't change anything.

EDIT:
 - I've resolved this by simply using a 640 x 480 Solid Black Pic...
 - Show the pic at 0 transparency, and move it at how ever many frames you want, and set it's opacity to 255...