Which color is most commonly used in emergency defibrillator designs to enhance visibility and create instant recognition?

Medical device design incorporates specific color choices that impact patient perception, clinical effectiveness, and brand recognition. Colors in healthcare products are carefully selected based on psychological responses, visibility in clinical settings, and cultural associations. How well do you know the strategic color decisions behind some of the world's most recognized medical devices and brands?

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Yellow (High-visibility with psychological associations to alertness and energy)
Blue (Associated with trust and calmness in medical environments)
Green (The color most visible to the human eye in all lighting conditions)
Orange (The international standard color for emergency medical equipment)