On Mister Rogers Neighborhood, Planet Purple is a planet on which everything is purple, and everyone and everything is the same. Every girl on Planet Purple is named "Pauline," every boy, "Paul." Purple Panda (played by David L. Nohling), a resident of Planet Purple, can return there "the purple way" (just by thinking).

In his book If We Were All the Same, Fred Rogers details attempts by the residents of Planet Purple, tired of all being the same, to become more colourful.

Planet Purple was discovered by Lady Elaine Fairchilde.

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