I haven't figured out what the color has to do with it, but I've heard that it has been proven that petting a cat will lower your blood pressure. Maybe that calming effect also enhances one's abilities. Than I propose that cats still have a psychological effect on us. Well, I've never owned a cat who could read labels, but every one could tell whether I was opening a can of people food or cat food. As far as I can tell the sound the opener makes is the same.
Cats are naturally solitary and aloof creatures.
They seem to do things only when they want to. I'm willing to swear that she has kept me from making mistakes at work by this inexplicable behavior. As much as I love to sew I do sometimes get bored with it. It's easy to spot when I'm not in the sewing mood. I putz around my sewing room putting things away or rearranging.