Yes, horses can see colour. While their ability to perceive colour is not as refined as that of humans, research suggests that horses are able to distinguish between at least some colours.

The colour vision of horses is thought to be similar to that of humans with red-green colour blindness. This means that they may have difficulty distinguishing between red and green hues, but they can still see other colours, such as blue and yellow.

In addition to colour vision, horses also have excellent night vision and a wide field of view, which helps them to detect predators and navigate their environment. They are also able to see ultraviolet light, which can be helpful in detecting predators and finding food.

Overall, while horses may not see colour in the same way that humans do, they do have the ability to perceive and distinguish between different colours. This can be important for communication and navigation, and it helps to keep horses safe and healthy.