Create an artistic image for a book cover. Highlight the protagonist, a young pale-skinned detective with light eyes, wearing a stylish police uniform with a cloche hat replacing the beret. Next to her, depict her husband, an elegant artist with lilac eyes and remarkable charm. In the background, craft a setting of 1930s London, incorporating all the details of the time, including authentic police attire with badges, as well as elements representing the fashion of the era. Ensure to capture the atmosphere of the period and emphasize the unique personalities of the main characters.