How do we perceive colors other than blue green and red?

We perceive colors other than blue, green, and red through the combination of signals from different types of cone cells in our eyes, which are sensitive to varying wavelengths of light. These cones respond to a range of wavelengths, allowing our brain to interpret a wide spectrum of colors by mixing the primary colors of light. For example, colors like yellow and cyan are perceived through the combination of responses from red, green, and blue cones. Our perception is further influenced by surrounding colors and lighting conditions, leading to the richness of color experiences.