They are the color blue.
Double Income No Kids
Skitta-marink-a-dink-a-dink doesn't mean anything. It is just a made up word/phrase to go with the song so deal with it!.
A "dink" is when a person doesn't follow through with their swing. They tend to lightly tap, or "dink," the ball over the net.
Net Shots (in New York Times Crossword Puzzle July 10, 2010)