The term 'cool colors' primarily includes which of the following colors?

Cool colors are primarily characterized by their association with calmness and serenity, often evoking feelings of tranquility and relaxation. The primary colors included in the category of cool colors are green and blue, along with purple. These colors tend to recede in space, creating a sense of depth and distance in artworks.

In contrast, warm colors such as red, yellow, and orange are associated with energy, warmth, and excitement. This makes the combination of green and blue the quintessential cool colors due to their nature of being more subdued and refreshing. Understanding the effects of color temperature allows artists to manipulate mood and emotion within their work effectively, using cool colors to create atmospheric perspective and harmony in compositions.