I remember the networks used to give the Republicans blue and Democrats red on their maps on their election night coverage until 1992 I believe. I think the color red and its connection to communism were being associated with the Democrats by many American voters. I’m guessing that’s why their media propagandists switched the colors!
It all changed in 2000 when it took weeks and weeks to finalize the election results — so the color-coded maps stayed around on TV news programs seemingly forever.
2000 was when the media officially switched the party colors. That the GOP never fought that deliberate mislabeling was, and remains, appalling. I never use it. Red is the historical and international color of totalitarian Socialism/Communism. Blue is the color of Conservatism.