What is the opposite of blue?

The opposite of the color blue on the color wheel is orange. Blue is a cool color, often associated with calmness, serenity, and tranquility. In contrast, orange is a warm color, associated with energy, enthusiasm, and excitement. Blue is a primary color, meaning it cannot be created by mixing other colors, while orange is a secondary color created by mixing red and yellow. Blue is commonly used to convey a sense of stability and reliability, while orange is often used to grab attention and create a sense of warmth and vibrancy.