In case you want to lighten up your Sense Home Screen or you got tired of the greyscale look, you can now have colored small icons for the Calendar and Alarm of Manila 2.5 Home Screen.

You need to download the cab to your device and run it, followed by a soft reset. After restart, your Calendar and Alarm icons should change to colored ones, namely yellow for alarm and standard red/white for the Calendar (similar to the active icon on lower the Sense tab navigation band). Uninstalling should revert to default but have a backup handy as usual just in case.

(Source: XDA Developers)