Mary Blair (1911–1978) might not be a household name, but the concept artist and designer without a doubt played a monumental role in shaping the magic of Disney animation at mid-century. In the decades following her death, thanks to a posthumous Disney Legend award and publications working to centralise the contributions of Disney’s creative women to its animation studio and parks, Blair has amassed a cult following. Today, she is best remembered for her prolific experimentation with colour and unique forms, most famously captured in the It’s a Small World parks attraction, as well as her concept art for films ranging from Saludos Amigos (1942) to Peter Pan (1953). In this chapter, I examine the artist’s process and the influence of Blair’s concept art on the production of Cinderella (1950), one of the most important films she contributed to. Though animators had difficulty translating all of Blair’s designs into animatable forms, her influence on Cinderella is undeniable. Analysing Blair’s concept art for Cinderella will helps readers more clearly understand what made the artist and her style so unique. Further, I consider how Blair’s knack for research empowered her to compose scenery reflective of a careful study of the French decorative arts tradition. Additionally, this chapter unpacks the ways in which Blair was repeatedly championed by Walt Disney himself during the production process. Ultimately, I argue, Blair’s concept art for Cinderella provides one of the clearest case studies for understanding her palette and creative process, as well as her position as an artist worth celebrating.