If the caravan is already painted in the car colour, you have your answer.
If you need to identify the colour of the caravan, go to the meeting at Begbroke tomorrow night, spaek to Gareth, and make an appointment to go see him at work, where he can help identify a colour match.
Sadly, I can't make it tomorrow, in Basingstoke until 4:30, then have to sort dinner for Susan when home.