What colors can cats distinguish?
1. Cats can distinguish between purple, blue, green, and yellow.
2. Red, orange, and brown are invisible to cats; they can only perceive green, blue, purple, and yellow.
3. For cats, red, orange, and brown can appear similar to a gradient from black to gray. 
4. Cats see colors with lower saturation, so the colors they see are not as vibrant and vivid as those seen by humans.
5. The television programs we watch are mainly composed of red, blue, and green light, which appear as gray, blue, and green to cats.
6. If we use the Sepia Filter (nostalgic tone) on the TV, reds and browns will turn purple, and the cat will be able to see the TV clearly.
7. Scientists have confirmed that cats can distinguish the following color combinations: red and green, red and blue, red and gray, green and blue, green and gray, blue and gray, and blue, as well as gray.
8. Discussions about other color combinations are still ongoing, but it is certain that cats do not have a strong ability to distinguish colors.
9. Color is not as important to cats as it is to humans. Cats only need one-sixth the amount of light that the human eye can perceive to accurately capture the movements and shape details of animals.
10. Cats have a much higher visual sensitivity in low-light conditions than humans, which allows them to hunt and navigate better in dim light.
