The Joker Rainbow Hands meme is a digital mashup featuring Joaquin Phoenix from the 2019 film 'Joker.' It parodies the legendary 'Imagination' meme originally made famous by SpongeBob SquarePants. In this version, the gritty and chaotic Arthur Fleck replaces SpongeBob, using his hands to create a vibrant rainbow that contrasts sharply with his dark character. The meme emerged shortly after the film's release as internet users began blending high-brow cinema with classic Nickelodeon tropes to express sarcastic optimism, dark humor, or mocking creativity.