Logomania is out again with Beautiful Blue...Rich with associations, blue features in many colourful expressions.
I'm very interested in how cats see colours.
For the longest time many people insisted cats can't see colours. However, cats have rods and cones in their retinae just as we do. However, from the number of these, it is assumed that cats see as we do but aren't quite as good at distinguising subtleties.
So you can ask your cat to sit only on the blue chair and to keep off the yellow, green and red furniture, but your kitty will have difficulty distinguishing the biscuit coloured throw rug from the straw coloured throw rug next to it.
On the other hand cats have brilliant night vision. So when we're trying to distinguish the sofa from the wall, they're shuddering at the clashing colours of the pink pullover you left hanging around on the orange sofa cover!