Red is a universal sign of danger and warning, red can create aggression and anger, especially if overused users in applications.

Physiologically, red stimulates and stimulates the physical body, including the nerves and blood flow, increases blood pressure and heart rate.

Red stimulates appetite and is, therefore a great color to use for products related to food and food services, such as restaurants and businesses in the food industry.

Red is exciting and motivates action, but excessive use can cause anxiety and fatigue.
There are also negative connotations related to blood, war, and violence.