It’s not easy to see, but in the new movie, the E and the V of ‘Chevrolet’ on the side of Barbie’s Corvette, are both highlighted in blue, as subtle confirmation that Margot Robbie’s character has not only gone green, she’s also become a fan of General Motors’ range of electric vehicles (although a pedant might point out that the first electric Corvette will not go on sale until next year).