Last up on our facts about Flag Day list is the significance of the flag's colors. The red, white, and blue are more than just good-looking colors that match well together. They have a deep significance in relation to the core principles for which our country stands. Firstly, the red symbolizes valor, hardiness, and the ability to endure. Secondly, the white represents innocence and purity. Lastly, the blue symbolizes vigilance, perseverance, and justice. These tenants are what set our nation apart from many others, and so it is only fitting that our flag’s colors would be a constant reminder of that.