Complete the retro look of your kitchen by adding some vintage-inspired wall decor. Hang retro tin signs featuring classic advertisements or iconic images from the 1950s. Look for artwork that showcases retro diners, jukeboxes, or vintage cars to enhance the nostalgic vibe. Additionally, consider installing a retro-style clock on the wall to add a functional and decorative element. You can also display vintage kitchen utensils or antique kitchen gadgets as wall decor. These small touches will help tie the retro theme together and create a visually appealing space that pays homage to the past.