Retro decor refers to a style of interior design that draws inspiration from past decades, typically from the 1950s to the 1980s. This aesthetic often features bold colors, geometric patterns, and vintage furniture that evoke a sense of nostalgia. Common materials include plastic, chrome, and wood, which were popular during these eras. Key elements of retro decor include iconic items like bean bag chairs, lava lamps, and mid-century modern furniture. Accessories such as vintage posters and record players can also enhance the retro vibe. Overall, retro decor celebrates the charm and creativity of earlier design trends, making spaces feel lively and unique.