Secondary colors are created by mixing primary colors together, and include green, purple, and orange. These colors are created by combining two primary colors in equal amounts.
In art and design, secondary colors are often used to create a range of different hues and shades by mixing them together in different proportions. They can also be used to create tertiary colors, which are the colors that are created by mixing a primary color with a secondary color.
In graphic design and printing, secondary colors are used to create images and designs using a process called CMYK (cyan, magenta, yellow, and black). These colors are used in combination with black to create a wide range of different shades and tones.