NAME Color::ANSI::Util - Routines for dealing with ANSI colors VERSION This document describes version 0.164 of Color::ANSI::Util (from Perl distribution Color-ANSI-Util), released on 2020-06-09. SYNOPSIS use Color::ANSI::Util qw( ansifg ansibg ); say ansifg("f0c010"); # => "\e[33;1m" (on 16-color terminal) # => "\e[38;5;11m" (on 256-color terminal) # => "\e[38;2;240;192;16m" (on 24-bit-color terminal) say ansibg("ff5f87"); # => "\e[47m" (on 16-color terminal) # => "\e[48;5;7m" (on 256-color terminal) # => "\e[48;2;255;95;135m" (on 24-bit-color terminal) There are a bunch of other exportable functions too, mostly for converting between RGB and ANSI color (16/256/24bit color depth). DESCRIPTION This module provides routines for dealing with ANSI colors. The two main functions are "ansifg" and "ansibg". With those functions, you can specify colors in RGB and let it output the correct ANSI color escape code according to the color depth support of the terminal (whether 16-color, 256-color, or 24bit). There are other functions to convert RGB to ANSI in specific color depths, or reverse functions to convert from ANSI to RGB codes. Keywords: xterm, xterm-256color, terminal BUGS/NOTES Algorithm for finding closest indexed color from RGB color currently not very efficient. Probably can add some threshold square distance, below which we can shortcut to the final answer. FUNCTIONS ansi16_to_rgb Usage: ansi16_to_rgb($color) -> color::rgb24 Convert ANSI-16 color to RGB. Returns 6-hexdigit, e.g. 'ff00cc'. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::ansi16* Return value: (color::rgb24) ansi256_to_rgb Usage: ansi256_to_rgb($color) -> color::rgb24 Convert ANSI-256 color to RGB. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::ansi256* Return value: (color::rgb24) rgb_to_ansi16 Usage: rgb_to_ansi16($color) -> color::ansi16 Convert RGB to ANSI-16 color. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::rgb24* Return value: (color::ansi16) rgb_to_ansi16_bg_code Usage: rgb_to_ansi16_bg_code($color) -> str Convert RGB to ANSI-16 color escape sequence to change background color. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::rgb24* Return value: (str) rgb_to_ansi16_fg_code Usage: rgb_to_ansi16_fg_code($color) -> str Convert RGB to ANSI-16 color escape sequence to change foreground color. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::rgb24* Return value: (str) rgb_to_ansi24b_bg_code Usage: rgb_to_ansi24b_bg_code($color) -> str Convert RGB to ANSI 24bit-color escape sequence to change background color. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::rgb24* Return value: (str) rgb_to_ansi24b_fg_code Usage: rgb_to_ansi24b_fg_code($color) -> str Convert RGB to ANSI 24bit-color escape sequence to change foreground color. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::rgb24* Return value: (str) rgb_to_ansi256 Usage: rgb_to_ansi256($color) -> color::ansi256 Convert RGB to ANSI-256 color. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::rgb24* Return value: (color::ansi256) rgb_to_ansi256_bg_code Usage: rgb_to_ansi256_bg_code($color) -> str Convert RGB to ANSI-256 color escape sequence to change background color. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::rgb24* Return value: (str) rgb_to_ansi256_fg_code Usage: rgb_to_ansi256_fg_code($color) -> str Convert RGB to ANSI-256 color escape sequence to change foreground color. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::rgb24* Return value: (str) rgb_to_ansi_bg_code Usage: rgb_to_ansi_bg_code($color) -> str Convert RGB to ANSI color escape sequence to change background color. Autodetect terminal capability and can return either empty string, 16-color, 256-color, or 24bit-code. Which color depth used is determined by "COLOR_DEPTH" environment setting or from Term::Detect::Software if that module is available). In other words, this function automatically chooses rgb_to_ansi{24b,256,16}*bg*code(). This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::rgb24* Return value: (str) rgb_to_ansi_fg_code Usage: rgb_to_ansi_fg_code($color) -> str Convert RGB to ANSI color escape sequence to change foreground color. Autodetect terminal capability and can return either empty string, 16-color, 256-color, or 24bit-code. Color depth used is determined by "COLOR_DEPTH" environment setting or from Term::Detect::Software if that module is available. In other words, this function automatically chooses rgb_to_ansi{24b,256,16}*fg*code(). This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $color* => *color::rgb24* Return value: (str) ansi16fg($rgb) => STR Alias for rgb_to_ansi16_fg_code(). ansi16bg($rgb) => STR Alias for rgb_to_ansi16_bg_code(). ansi256fg($rgb) => STR Alias for rgb_to_ansi256_fg_code(). ansi256bg($rgb) => STR Alias for rgb_to_ansi256_bg_code(). ansi24bfg($rgb) => STR Alias for rgb_to_ansi24b_fg_code(). ansi24bbg($rgb) => STR Alias for rgb_to_ansi24b_bg_code(). rgb_to_ansi_fg_code($rgb) => STR ansifg($rgb) => STR Alias for rgb_to_ansi_fg_code(). ansibg($rgb) => STR Alias for rgb_to_ansi_bg_code(). ansi_reset( [ $conditional ]) Returns "\e[0m", which is the ANSI escape sequence to reset color. Normally you print this sequence after you print colored text. If $conditional is set to true, then ansi_reset() will return "" if color is disabled. ENVIRONMENT NO_COLOR Can be used to explicitly disable color. See for more details. Observed by: ansi{fg,bg}. COLOR => bool Can be used to explicitly disable color by setting it to 0. Observed by: ansi{fg,bg}. COLOR_DEPTH => INT Can be used to explicitly set color depth instead of trying to detect appropriate color depth. Observed by: ansi{fg,bg}. HOMEPAGE Please visit the project's homepage at . SOURCE Source repository is at . BUGS Please report any bugs or feature requests on the bugtracker website When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature. SEE ALSO Term::ANSIColor AUTHOR perlancar COPYRIGHT AND LICENSE This software is copyright (c) 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013 by perlancar@cpan.org. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.