Originally Posted by horse_luver4e
Yep! Your right they can! :)
horses see in monochromatic image. For lack of a better description they see almost like a photograph in Sepia print. (Like in an olden day photo for those who don't know what Sepia is).
So no IMO, horses don't see colour as such but they do see shades of light in different tones - this could be confused for them seeing colour as they have done tests, like the one that Jazzy mentioned, that show they can recognise different tones.
Edited to add - I think that this is a loaded subject that could go around in circles for days as I just googled the subject to see if I could find a medical study to back up what I said and I found multiple studies to verify BOTH sides of the story, some scientists say they can see colour and some say they can not.