Rabbits can only see some colours, but they can tell the difference between colours and don’t just see in black and white. Rabbits can’t see red, but they can see green, yellow, and blue in different shades.
Animals like rabbits can see colours because their eyes have special cells that can absorb certain wavelengths of light and send that information to the brain. People have three sets of these cells, which are called cone cells. The cone cells in our eyes can see shades of red, blue, and yellow-green. There only seem to be two kinds of cones on a rabbit. They can pick up blue and green light, but not other colours, so they look grey.