Riddle search

The names of the 21 colors listed below are hidden in the grid of letters. Look across, back, down, up, and diagonally at the letters, and circle each color you discover. The word AQUA has been circled as an example.
When you’ve circled all the colors, write the unused letters from the grid on the blank spaces at the bottom of the page. Keep the letters in order, from left to right and from top to bottom, and you’ll discover the answer to this riddle: WHAT IS BLACK AND WHITE AND RED ALL OVER?

The answer to the riddle is: A SUNBURNED ZEBRA.