The recent United States, the grounding line is green, yellow-green stripes or bare, neutral line should be white or gray, electric route may be black, red, blue, yellow, orange or yellow, what color depends on the voltage.
These color standards are in the United States and other country codes are different (Canada is very similar to the United States). For example, Australia and New Zealand and the United States have the same color grounding lines, their neutral line is blue or black. Also, the live line can be any color other than the grounding line and neutral line. Red and brown are recommended colors for single-phase lines, and red, white, and blue are recommended colors for multiphase, electrically charged wires.