Having grown up with black % white TV, I know blue is grey and white is white.

When my mother was little they had a dog that had a route. One time, my mom was really sick and needed medicine and her mother couldn't leave her. The sent the dog off with a note and carrying a little pail in its mouth. Its route included the small store where it always stopped for a visit. The woman at the store read the note, put the medicine in the dog's pail and the dog returned home.