The hot car colour right now is black, in both solid and metallic. The "blackest" of all Volvo's car models is the baby of the family, the Volvo C30."Colour trends in clothes make their way to interior decorating and then come to cars. Car buyers often need to acclimatize to a fashionable colour before taking it on board," says Cilla Stark, designer and colour specialist at Volvo Cars.