There was once a jackal who fell into a vat of blue indigo dye. The other animals were amazed when they saw the blue jackal!
"The gods have sent me to be your ruler," the blue jackal explained. He made the lion his prime minister, the tiger was the royal treasurer, and the elephant was his doorkeeper.
One day, though, the blue jackal heard other jackals howling in the distance. He could not resist; he began howling too.
"He's just an ordinary jackal!" shouted the other animals.
So the lion and the tiger attacked their former king and killed him.
Inspired by: The Panchatantra, translated by Arthur Ryder. It is in Book 1, Story 14.
Notes: You can read about the history of indigo dye at Wikipedia.