After France's new shade of blue was introduced last year without anybody noticing, we look into the flag changes in Europe that caused a stir over the year.

France changed the color of it's flag over a year ago and no one noticed. French news outlets revealed on Sunday that the blue third of the flag was made darker.

The U.S., France, Chile and more all have this commonality: red, white and blue flags. Here's why, as explained by Ted Kaye of the North American Vexillological Association.