What colours can guinea pigs, rats, and hamsters see ?

I don't know about normal ones but the blind one that I have sees no color. I have tested this with several experiments.What colours can guinea pigs, rats, and hamsters see ?
Rodents are dichromates, same as dogs, which is the same as being red-green colorblind. Red and green look like the same color, a dull yellow. Other colors they can see, a rainbow looks like this:








http://en.wikipedia.org/wiki/File:Rainbo鈥?/a>





http://www.uwsp.edu/psych/dog/LA/dogvis.鈥?/a>