Greys, blacks and whites are still the most popular new car colours in Britain and Germany, where “greener” forms of propulsion have not dislodged monochromatic hues. Amid another year of tumultuous global events, British drivers doubled down on their preference for drab or unadventurous shades in 2021, with grey increasing its dominance as the UK’s favourite new car colour for the fourth year in a row. The trend was borne out by figures from the Society of Motor Manufacturers and Traders (SMMT). It was a similar picture in Germany where nearly three-quarters of cars registered from January to…