How can I obtain the correct shade of paint?

contact ABI and ask if there is a paint code on the Identity plate like there is on cars. look for the plate either on tow bar end or body work low down by door take note of all details then phone and ask about paint.
First try http://www.abiuk.co.uk/contact_abi
seems to be the static part of the company.
or

ABI Caravans Ltd
Swinemoor Lane
Beverley
Humberside HU17 0LJ

Tel:01482 862976

ABI Caravan Specs

Bob
April 2012