Your clothing can affect your pooch’s emotional state. Dogs do not see color the same way people do, but they do have blue and yellow color receptors (humans have blue, yellow, and red). This means that dogs see various colors as shades and intensities of blue, yellow, brown, and gray.
Although dogs can see color, they are much more visually stimulated by contrast. Narrow horizontal stripes are the most averse to shy or anxious dogs. Vertical stripes have less of an effect, as do wider horizontal stripes. Evolutionary psychologists have suggested that this sensitivity to coloration and pattern, which occurs in many animals, may be a protective mechanism against poisonous or harmful animals.
The take-away message? When working with an anxious animal, or choosing a new companion from the shelter or a breeder, you may want to wear solid-colored clothing. The good news is that once you have a calm, well-adjusted pet, they are unlikely to have a strong negative response to your favorite striped shirts.