SWI-Prolog -- ansi

Availability::- use_module(library(ansi_term)).(can be autoloaded)

[det]ansi_format(+Attributes, +Format, +Args)

Format text with ANSI attributes. This predicate behaves as format/2 using Format and Args, but if the current_output is a terminal, it adds ANSI escape sequences according to Attributes. For example, to print a text in bold cyan, do

?- ansi_format([bold,fg(cyan)], 'Hello ~w', [world]).

Attributes is either a single attribute or a list thereof. The attribute names are derived from the ANSI specification. See the source for sgr_code/2 for details. Some commonly used attributes are:

bold
underline
fg(Color), bg(Color), hfg(Color), hbg(Color)

Defined color constants are below. default can be used to access the default color of the terminal.

black, red, green, yellow, blue, magenta, cyan, white

ANSI sequences are sent if and only if

The current_output has the property tty(true) (see stream_property/2).
The Prolog flag color_term is true.