2025 is the ninetieth anniversary of the launch of Penguin Books one of the UK’s most enduring and successful publishers. From the outset Penguin was synonymous with its branding with their considered logos, fonts and most vividly their colour coded series – orange for fiction, green for crime fiction, dark blue for biography and so on.[1] Sought after as much for the look as the content, books published by Penguin from the mid 1930s until the early 1970s are icons of British book design.