T-Mobile Says It Owns Exclusive Rights To the Color Magenta A German court has told startup insurer Lemonade to stop using a similar shade in marketing November 4, 2019 https://adage.com/article/digital/t-mobile-says-it-owns-exclusive-rights-color-magenta/2212556
...um... prior art ? I do believe the colour is a whole lot older than T-Mobile, or maybe they bought the rights from a bloke in a car park.