Which of the following is classified as a warm color?

Warm colors are typically associated with energy, vibrancy, and warmth, evoking feelings of warmth and comfort. Red is classified as a warm color because it is often associated with emotions such as passion and excitement. It tends to enhance feelings of warmth in a space, making it appear more inviting.

In contrast, blue and green are considered cool colors. Blue tends to evoke calmness and serenity, while green brings to mind feelings of nature and tranquility. Violet, being a blend of blue and red, can carry both warm and cool qualities, but it is generally regarded more as a cool color because of its blue undertone. Therefore, red stands out clearly as a warm color in this context.