McDonald's red and golden arches are among the most recognized brand symbols on earth, engineered to trigger appetite and project joyful, fast food energy.
McDonald's yellow and red combination is scientifically optimized for fast food — red stimulates appetite and creates urgency, while yellow evokes happiness and the visual warmth of fried food. Together they form one of the most powerful appetite-triggering color combinations known in food marketing. The Golden Arches specifically were designed as an abstract representation of two golden arches flanking a restaurant, which were later unified into the now-iconic 'M' shape.