The primary color associated with danger or warning is red. This color is widely recognized for its visibility and ability to draw attention, making it an effective choice for signaling caution. Red is commonly used in warning signs, traffic lights, and emergency stop buttons to indicate hazards, prohibit actions, or alert individuals to potential dangers. The psychological impact of red can evoke a sense of urgency, making it essential in safety-related contexts. Additionally, red is often used in fire safety equipment, such as fire extinguishers and alarms, symbolizing the need for quick action in emergencies.