Which of the following colors is not considered a warm color?

The reason blue is not considered a warm color lies in the color theory that categorizes colors into warm and cool tones. Warm colors include reds, yellows, and oranges, which are associated with energy, brightness, and warmth, often evoking feelings of comfort and excitement. These colors are reminiscent of elements like fire and sunlight, which contribute to their classification as warm.

On the other hand, blue is classified as a cool color. Cool colors are associated with calmness, serenity, and tranquility, reminiscent of elements like water and the sky. Blue can invoke feelings of peace and can often create an atmosphere that is more subdued than that created by warm colors. Thus, understanding the emotional impact and associations of each color helps to clarify why blue stands out as a cool color in contrast to the warm colors listed in the other options.