The three primary colors are red, blue, and yellow. These colors are considered primary because they cannot be created by mixing other colors together, and they serve as the foundation for creating a wide spectrum of other colors. When mixed together in varying combinations, these primary colors can produce secondary colors: red and blue make purple, blue and yellow create green, and yellow mixed with red yields orange. In additive color mixing, such as with light, the primary colors are red, green, and blue (RGB), which combine to produce all other colors in that medium.