Welcome to LionBleacher
. By performing this installation, the brown textures and graphics from Address Book and iCal in Lion become "discolored". Address book receives a blue pattern instead of Apple's own brown leather. Since this app now differs utmost from Apple's own interface guidelines, the look and layout of Address Book in Snow Leopard probably cannot be recovered. But you can get rid of all browns and ocres. My choice here is black and blue.
iCal makes the task a lot easier. Here the brown graphics and the torn paper are either deleted or simply replaced by gray. It seems that all brownish text color in UI-elements cannot be easily changed since Apple uses compiled NIB files.
No system files or preferences are modified, only graphics. However, there is an option in the Installer to return to Apple's own design. The installation is still at your own risk, so you should have a time machine backup ready.
First app of its kind. Automatically checking whether the Download meets your system reqirements. Using theoriginal Apple installer with uninstaller option (original graphics) included. This is why the file size is quite heavy. Others try to do this manually.