Phased: Circuit Colors is a simple to use electrical wire phasing reference app. That will help you quickly determine the color wire to pull on the job. Having three selections to choose from. • Three Phase 120/208V (black, red, blue) • Three Phase 277/480V (brown, orange, yellow) • Single Phase (black, red). Colors are adjustable and will be remembered for the next time you use the app. This app is great for wire pulls.