Note on UV: I believe these are potentially manganese glass, with the tray shining bright green under 395nm light. Style: Art Deco (1930s–1940s). Color: Deep Cobalt Blue (Bristol Blue style).
This product would be a great fit for those looking for a luxurious and unique vanity set, especially one that has a decorative touch with its vintage art deco design and cobalt blue color, and also incorporates a fun and educational element, as it reacts to UV light.