You put your iMac to the side of the Apple Cinema LED Display. You see that the iMac has yellowed colors. Well I've got a solution - Color profiles!
Download:
http://www.mediafire.com/?jnd4imyb4mz
Place In:
[Macintosh HD]\Library>ColorSync>Profiles>Displays
Download:
http://www.mediafire.com/?jnd4imyb4mz
Place In:
[Macintosh HD]\Library>ColorSync>Profiles>Displays