DockColorize is a new tweak in Cydia released a few hours ago, with this tweak you can add a little color in iOS’s dock, and task’s switcher. Tweak adds a settings menu to iOS default setting, there you can add colored versions of native graphics made by Apple to dock and task switcher. Developer also say that we can add their own versions of graphics to DockColorize folder, so basically you can change everything anyway.
Ever wanted to change the image of multitasking tray or dock your background? well now it’s Possible! The package Comes with the original textures in different colors But you have the option to add your own or with ssh iFile!
DockColorize is available on the BigBoss repo of Cydia, but only works on iOS 5.