a beautifully struck American flag in all its glory The flag of the United States is a symbol of freedom before which Americans recite the pledge of allegiance. The flag's 13 red and white stripes represent the 13 original colonies. Its 50 white stars on a blue background represent the 50 states. Each of the colors on the flag has a meaning: Red: valor and bravery White: purity and innocence Blue: vigilance, perseverance, and justice A star is added to the flag when a new state joins the United States. The flag was last modified on July 4, 1960, when Hawaii was incorporated as a state.