We believe cats do see in color, although not exactly the way we do. In past tests, cats appeared to distinguish between the low to mid light wave spectrum (higher frequency), meaning cats responded to the colors purple, blue, green and yellow range. Red, orange and brown colors appear to fall outside cats color range and are most likely seen as shades of gray or purple. Cats appear to see less saturation in colors than do humans, meaning cats do not see colors as intensely or vibrantly. Blue and green appear to be the strongest colors perceived by cats. Tests suggest cats can distinguish between more shades or levels of gray than can humans.
Cats, like dogs, can see some colors: They can tell the difference between red, blue and yellow, and between red and green, although these are less distinguishable. Cats are able to distinguish between blues and violets better than between colors near the red end of the spectrum.
Color is of little importance to cats. They hunt by the motion of their prey, not by its color.
COURTESY OF In Cats (Felines), Cat Health, Domestic Cat Breeds