Which psychological reason did McDonald's choose red and yellow as their primary brand colors?

Brand colors in the food industry are far from random choices! They're carefully selected to evoke specific emotions and psychological responses. Red stimulates appetite and creates urgency, yellow captures attention and creates happiness, while green suggests freshness and health. This trivia tests your knowledge about one of the most recognizable food brand color schemes in the world - but do you know the strategic thinking behind it?

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Red stimulates appetite while yellow creates feelings of happiness and friendliness
Yellow represents affordability while red symbolizes premium ingredients
Red stands for their ketchup while yellow represents their mustard
These colors tested best with children in focus groups during the 1960s