The McDonald's yellow and red combination is the go-to example in every color psychology class, and for good reason: it's been driving purchase decisions from a quarter mile away since the 1960s. The Golden Arches are recognizable to most people before they can read.
The Golden Arches yellow (#FFC72C) is one of the most recognized symbols on Earth — visible from a highway at 70mph, identifiable to children before they can read. Red (#DA291C) adds energy and urgency, nudging customers toward a quick decision rather than deliberation. Food psychologists have noted that this specific red-yellow pairing is common across fast food because both colors appear in ripe fruits and trigger appetite associations. McDonald's deployed the combination so consistently for so long that it became the default visual shorthand for "cheap and fast."
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