HI-I HAVE HEARD THAT CATS SEE SLIGHT COLOR- I BELIEVE HOWEVER, THAT THEY SEE DIFFERENT SHADES WHICH APPEAR TO THEM TO HAVE OVERALL GRAY TINTS. IT MAKES SENSE TO ME THAT A WARM COLOR OF A ROOM OR SLEEPING AREA WITH A FAVORITE BLANKET OR TOY WOULD APPEAL TO A CAT. I THINK THE EYE OF A CAT HAS "CONES" THAT PROCESS THE COLOR DIFFERENTLY FOR CATS AND DOGS. MY CATS' TOYS HAVE ALWAYS BEEN ALL COLORS BUT CATS OF COURSE HAVE DIFFERENT TASTES AS YOU KNOW. BYE SUSANSWATLIN518