Dogs DO see in colour! Thought they only saw black, white and gray? Incorrect!
Dogs do in fact see in colour, they just see far fewer colours than us humans do. They can see in blue, yellow and gray! Thats why, when you red or green ball across the garden, your dog has a chance of running right past it. If its not blue, yellow or gray, it can blend into the grass.
Go to TalkingPets.ca/ go to the Dog Quiz and go to expert, it might say its colour blind!