People are only just realising why the McDonald's sign is red and yellow and it is blowing their minds.
The signature colours have been used by the fast food giants ever since its first opening in 1955 and the reason behind it lies within our psychology.
Psychologist Karen Haller explained that certain combination of colours have a powerful impact on the human psyche, with colours being communicated to the brain quicker than words or shapes, as "they work directly on our feelings and emotions".
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She said: "Red triggers stimulation, appetite, hunger; it attracts attention.
"Yellow triggers the feelings of happiness and friendliness. When you combine red and yellow it’s about speed, quickness. In, eat, and out again."
Meanwhile, yellow is the most visible colour in daylight, which makes the logo more attention grabbing to potential patrons.
In the meantime, many shops have also started incorporating green as a colour too, by refurbishing the facade of their stores, in order to create a more comfortable dining experience.
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Haller added: "Green elicits the feelings of nature; natural and environmentally friendly. It’s no longer about rushing in for a quick bite to eat. You can relax, get comfortable, linger over a coffee."
Social media users took to Twitter to share their shock at the news, with one writing: "I thought it looks like French fries, and that's why they use this colour?"
A second added: "I also read somewhere that it stimulates hunger."
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