In what year did the occurrence of using different color schemes for the parties stop?
Political color schemes in the United States diverge from international norms. Since 2000, red has become associated with the right-wing Republican Party and blue with the left-wing Democratic Party. However, unlike political color schemes of other countries, the parties did not choose those colors; they were used in news coverage of 2000 election results and ensuing legal battle and caught on in popular usage. Prior to the 2000 election the media typically alternated which color represented which party each presidential election cycle. The color scheme happened to get inordinate attention that year, so the cycle was stopped lest it cause confusion the following election.