Hi, Carol,

Yes, they can change color, but not as easily or as much as something like, say, a chameleon. For the spider it may take several days or more for a color change to occur, and the colors are primarily between white and yellow (though, I have found some very light or very pale green ones, too). I have a few pictures of the yellow ones and another light green one posted among my pictures. They can blend in very well with the right background.