colour changer in media player 11

when you watch a video clip in media player there is an area of black around it but some how i managed to change it to blue and it is starting to get annoying and i have forgoten how to change it back. any help?

The arrow under Now Playing, and then choose Enhancements.

where in there though cause the only colour changer enhancements i can find are the ones that changes the skin colour and one that changes the hue.

Upgrade to WMP 10.
Or In the enhancements, just go through each list and RESET

i dont think i want to downgrade. i guess i will just leave it as it is.