There is no definitive answer to this question since each dog's eyesight is different. However, generally speaking, dogs tend to see colors in a similar range to humans but with less saturation and brightness. This means that dogs are likely to see colors like blue, yellow, and green more easily than colors like purple, pink, and brown.grey.ultraviolet.
While there is no easy answer, you can consult with your veterinarian to get a better idea of what colors your dog can see best.