I just got a ticket and they put the wrong colour! Brown when its red ... do I still have to pay?

I unfortunately got a parking ticket for overstaying on a ticket in Nottingham (expired time). Fairs fair I was in the wrong (chatting too much!), but on the ticket it states colour of car as Brown, when it is in-fact Red (a dirty red all beit!). (NB the reg number was correct though) Can I refuse to pay under the premise the ticket had incorrect details? Any help appreciated.