Package colour ([docs]1) provides [Quake-style colour formatting]2 for Unix terminals. It is a drop-in replacement for the fmt package. The package level functions can be used to write to stdout (or strings or other files). If stdout is not a terminal, colour formatting will be stripped. eg. For more control a Printer object can be created with various helper functions. This can be used to do useful things such as strip formatting, write to strings, and so on. The following sequences are converted to their equivalent ANSI colours: