are dogs color blind

Dogs are not completely color blind, but they are color impaired compared to humans. They have only two types of color receptors (cones) in their eyes, whereas humans have three. This means dogs see colors mainly in shades of blue and yellow and cannot distinguish red and green well. The colors red and green likely appear as brownish or grayish to them. Essentially, dogs have a type of color vision similar to humans with red-green color blindness. So, dogs see the world in a more limited color spectrum, mostly in combinations of blue and yellow, but not in black and white as sometimes depicted.