ansi_get_color/2

Documentation
- Reference manual
  - The SWI-Prolog library
    - library(ansi_term): Print decorated text to ANSI consoles
- Packages

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

[semidet]ansi_get_color(+Which, -RGB)

Obtain the RGB color for an ANSI color parameter. Which is either a color alias or an integer ANSI color id. Defined aliases are foreground and background. This predicate sends a request to the console (user_output) and reads the reply. This assumes an xterm compatible terminal.

RGB is a term rgb(Red,Green,Blue). The color components are floats in the range 0.0..1.0. They are sRGB encoded, as that is what the terminal reports; linearise them before doing colour arithmetic that assumes light intensities.

Compatibility: Up to version 10.1.13 the components were integers in the range 0..65535. The terminal reports one to four hexadecimal digits per component, so that range suggested a precision the reply does not have, and it clashed with the rgb/3 term of win_window_color/2, whose components are in the range 0..255.