cant confirm but colour names sometimes bear little resemblence to the actual colour.. If the car's basically white and the V5 says white then I would not worry about that..

in my experience main dealers take everything off the chassis number anyway that way they know exactly what paint was applied to the car when it was built. If you do a free / cheap HPI check it should show a colour change if it was registered with the DVLA.

My Yamaha is white yet is has blue in the offical colour name.. try googling the colour code and see what comes up..

HTH..