Popular belief if that dogs see in black and white, this is not entirely true.
Human’s eyes receive information through receptors called cones and rods
cones perceive color, and rods register light . A human has about 6,000,000 cones, and about 1200,000,00 rods in one eye. This means that humans also receive only three colors through these cones: red, yellow, and blue. Dogs only have 120,000 cones but have a marginally larger amount of rods than humans (we don’t know exactly how many) Dogs only receive two colors: blue, and yellow. This means that a dog would see a rainbow blue, yellow dark blue, dark yellow, grey, and black. So, dogs do not see in black and white.