Cats can see colors, but not as vividly as humans do. They have two color-detecting cones that let them see blue-violet and yellow-green wavelengths of light, but not red-orange. The colors that cats can see are more muted than the human color spectrum, and they cannot perceive the full range of colors that humans can. Cats are masters in the grey undertones, and they see the best in grey, green, and blue colors. They are not good at distinguishing between purple, yellow, and even white, and they are inclined more towards blue and green shades. The sun in their world vision is green and blue. Cats are unable to perceive red, orange, and brown. They are also not sensitive to changes in brightness, so they do not have the ability to perceive color in the rich, vibrant tones that humans do. Knowing what colors cats can see can help in making good choices for them, such as keeping their color range in mind when shopping for toys.