What colours are the 3 wires in a cable going to a fan called?

The three wires in a fan cable are typically color-coded as follows: the brown or black wire is the live (or phase) wire, the blue wire is the neutral wire, and the green or yellow-green wire is the earth (or ground) wire. These colors may vary by region, but this is a common standard in many places. Always consult local wiring codes or guidelines when working with electrical installations.