Cats see colors best in shades of blue and yellow. They have difficulty distinguishing red, green, and orange hues, which appear more gray or dull to them. Their vision also emphasizes shades of gray, which helps them in low- light conditions. Some sources also suggest cats may see some shades of green, but this is less certain. Overall, cats perceive a more muted color palette compared to humans, focused mainly on blue and yellow tones.