In September 2019, Sound Transit renamed Central Link to the Red Line and Tacoma Link to the Orange Line as part of their update to transit branding. Two months later, the agency announced that it would consider a new name for the Red Line after complaints because of the similarity of the "Red Line" with redlining as well as confusion over King County Metro's RapidRide system (which utilizes red bullets for its service routes). A new naming scheme will come into effect in 2021, using "Line 1" (green) for the existing line in Seattle, "Line 2" (blue) for East Link, and "Line T" (orange) for Tacoma Link. Future light rail extensions will use "Line 3" (magenta) and "Line 4" (purple), alongside new names for Sounder and bus rapid transit services.