The colors are swapped from what they should be. But on war planning maps the friendly forces are blue and the enemy is red. The media used this to label Republicans as the enemy.
The Red is from the stripes on the Flag of the United States of America, representing the lifeblood of Patriots. Predates the moronic failed Communists by a considerable time.
I wouldn’t sweat it. Best color on our flag and the one with deepest meaning.