Giving the Permission to Overwrite the Selected Item Color

Configuration > [SmartOrg] Administration[Users] User Types
  1. Click a user type.
  2. Click Recruiting.
  3. Click Edit next to Other.
  4. Select the Access the "Preferences" section in 'My Setup' menu permission.
  5. Click Save.

Users having this user type will be able to overwrite the default selected item color in their user preferences.