But that refers to mass production of motor vehicles and Henry Ford's "any colour so long as it's black" was the result of economies of scale in buying paint and saving on time and cost in offering only one colour. (From 1908-1914, Ford cars were available in a range of colours, but not black!) In the late 19th century and after there were horse drawn delivery vans and carts which were extensively decorate, and so were the early motorised ones. Here's a link to a 1912 delivery used by a retailer in Birmingham:
http://www.leelonglands.co.uk/live/news/Motorised%20Van.jpgWe can't be sure of the colour, but it's clearly white or cream or light yellow. Even red was used, a notoriously difficult colour to paint with even today because the pigment is semi-transparent.