Q: What color is a happy cat?
A: Purr-ple!

Explanation: Cats make two common sounds- they meow and they purr (they can also howl and screech but those sounds are not as common).  Purring is that low, rumble that you can feel on a cat’s neck under its chin.  Purring is a sound that a cat makes when it is happy.

Purple, as you know, is a color.

This joke is funny because it plays with the pur in purple and purr. I hope you have a purrfect day!