@Vincent BergUm, no. The red/blue terminology is fairly recent, having been adopted within my memory. I think Wikipedia is right when it says that it arose with the 2000 election, when we were looking at that fucking electoral map for weeks while the talking heads went on about hanging chads and butterfly ballots. Before that, there weren't consistent party colors โ they varied from year to year and sometimes from network to network, and they weren't even always red and blue. I've seen maps of Reagan's 1984 landslide that were just a sea of blue with a couple of red spots in it.
There was a tendency, I think, to use blue for the incumbent party and red for the challenging party, which is how we've ended up with the current color coding, opposite of pretty much everyone else, where red is associated with the left. Just because, in 2000, when the colors got set in stone, the Democrats happened to be the incumbent party.