red
Explanation
The Joke
The comic is a simple, striking visual: a landscape divided between a red sky and a white, snowy ground, with very little detail visible. The caption below reads: "Laugh all you want, for now. When Nuclear Winter comes, only the gingers will have perfect camouflage."
The image itself is the joke -- the red-and-white color scheme perfectly matches the stereotypical complexion of a red-haired, pale-skinned person (colloquially called a "ginger"). The comic imagines a post-apocalyptic nuclear winter scenario where the landscape is nothing but red skies (from atmospheric particulates) and white snow, meaning redheads would blend in perfectly.
The Humor
The humor works on multiple levels. First, it takes the common social experience of redheads being teased or mocked for their appearance and flips it into a revenge fantasy -- but an absurdly dark one that requires nuclear apocalypse. Second, the idea of camouflage being the key survival advantage in a nuclear winter is itself ridiculous, treating the apocalypse like a game of hide-and-seek. The deadpan, threatening tone of "laugh all you want, for now" gives the caption the feel of a supervillain monologue, which contrasts hilariously with the mundane subject of hair color.