Mister Rogers' Neighborhood (1968)

S05E42 Lady Elaine's Purple Phase Pt 2

While browsing Negri's Music Shop, Rogers is captivated by the sound of a harpist playing. Meanwhile, in the Neighborhood of Make-Believe, Lady Elaine excitedly reveals her latest find: the Planet Purple, a whimsical place where everything is drenched in shades of purple.