Pankaj
Thank you for your reply.
I was trying to say that after the update to current version of Joomla that the colour theme settings were no longer selectable.
As I had backed up the site prior to Joomla update I was able to reinstall the backup.
I do not know of any easy way to comfirm compatibility of extensions, plugins, templates prior to an update.
For this I will wait till i see a T3 update then update joomla.