Primary colors, also referred to as primary colours, are a set of base hues that cannot be obtained by mixing other colors together. They serve as the building blocks for all other colors on the color wheel. Primary colors include red, blue, and yellow. However, there are alternative terms that can be used synonymously with "primary colors". They can be referred to as fundamental colors due to their essential role in the color spectrum. Additionally, primary hues can also be described as elemental colors, as they are pure and cannot be obtained by the combination of other shades. These synonyms highlight the significance and unchangeable nature of primary colors in the world of art and design.