Red is associated with a variety of emotions. It can be connected to love, passion, romance, confidence, strength, power, comfort, warmth, and excitement, but it can also be linked to urgency, anger, intensity, and aggressiveness.
Red light is often used in casinos because it makes people feel excited and gives a sense of confidence, which makes them want to stay and spend more money there.
It is also common for restaurants to use red in their logo and feature it inside because red is the most appetizing color.
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