iOS 5 changed the database that deals with Calendar colors. The value is now a hex value just like CSS uses (something like #fe6548)
– Install sqlite3 via Cydia (you must have Cydia in “Developer” mode so it lists the command-line utilities)
– ssh to your iPhone (as user mobile)
– Run sqlite3 and open the calendar database
iPhone:~ mobile$ sqlite3 /var/mobile/Library/Calendar/Calendar.sqlitedb
– Issue the SQL commands to change the calendar colors:
sqlite> UPDATE Calendar SET color=’#9FC6E7′ WHERE title = ‘Chris Carey’;
sqlite> UPDATE Calendar SET color=’#FF7537′ WHERE title = ‘Work’;
sqlite> UPDATE Calendar SET color=’#D06B64′ WHERE title = ‘Important’;
sqlite> UPDATE Calendar SET color=’#B3DC6C’ WHERE title = ‘School’;
sqlite> UPDATE Calendar SET color=’#4986E7′ WHERE title = ‘Chris & Nasique’;
sqlite> UPDATE Calendar SET color=’#AC725E’ WHERE title = ‘Health’;
sqlite> UPDATE Calendar SET color=’#FF7537′ WHERE title = ‘Work’;
sqlite> UPDATE Calendar SET color=’#D06B64′ WHERE title = ‘Important’;
sqlite> UPDATE Calendar SET color=’#B3DC6C’ WHERE title = ‘School’;
sqlite> UPDATE Calendar SET color=’#4986E7′ WHERE title = ‘Chris & Nasique’;
sqlite> UPDATE Calendar SET color=’#AC725E’ WHERE title = ‘Health’;
-Quit sqlite3
.quit
-Quit ssh
exit
If needed, kill the calendar app or reboot the phone to get it to reload the new colors
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