<: use utf8; use strict; use warnings; use open IO => ':utf8'; use List::Util 'min'; our $VERSION = 'v1.0'; $header{content_type} = 'text/html; charset=utf-8'; :> terminal colour cheat sheet

Terminal colours

<: sub luminance { # perceived brightness (using ITU-R recommendation 601 luma co-efficients) my ($r, $g, $b) = @_; return $r*.299 + $g*.587 + $b*.114; } sub colcell { my $id = shift; my @rgb = @_ >= 3 ? @_ : (map {hex} $_[0] =~ /(..)/g); my $rgb24 = ''; $rgb24 .= sprintf '%X', min($_ / 17 + .5, 15) for @rgb[0..2]; my $rgb48 = ''; $rgb48 .= sprintf '%02X', $_ for @rgb[0..2]; my $inverse = sprintf('%X', luminance(@rgb)/255 < .3 ? 12 : 0) x 3; return sprintf '', (map {'\n"; for my $num (0 .. 15) { printf('%s'."\n", join('', map { my $rgb = $col{$_}[$num + 2]; colcell($_ eq 'html' ? $col{-name}[$num] : $num, $rgb, $col{$_}[0]) } @termlist ), ); } :>
%s%s%s', "background:#$rgb48; color:#$inverse", $id, "background:#000; color:#$rgb48", $rgb24, "background:#FFF; color:#$rgb48", $rgb24, } my %col = ( -name => [ qw/black maroon green olive navy purple cyan silver gray red lime yellow blue fuchsia aqua white/, qw/reset bold dim italic underline blink fastblink reverse hidden/, ], html => [ qw/000000 CCCCCC/, qw/000000 800000 008000 808000 000080 800080 008080 C0C0C0 808080 FF0000 00FF00 FFFF00 0000FF FF00FF 00FFFF FFFFFF/, ], cga => [ qw/000000 CCCCCC/, qw/000000 AA0000 00AA00 AA5500 0000AA AA00AA 00AAAA AAAAAA 555555 FF5555 55FF55 FFFF55 5555FF FF55FF 55FFFF FFFFFF/, ], xterm => [ qw/000000 CCCCCC/, qw/000000 CC0000 00CC00 CCCC00 4682B4 CC00CC 00CCCC E5E5E5 4C4C4C FF0000 00FF00 FFFF00 1E90FF FF00FF 00FFFF FFFFFF/, ], tango => [ qw/000000 CCCCCC/, qw/2E3436 CC0000 4E9A06 C4A000 3465A4 75507B 06989A D3D7CF 555753 EF2929 8AE234 FCE94F 729FCF AD7FA8 34E2E2 EEEEEC/, ], ); my @termlist = qw(html cga xterm tango); print '
'.$_} @termlist), "

88-colour space

<: for my $r (0 .. 3) { print ''; for my $g (0 .. 3) { for my $b (0 .. 3) { print colcell($r*4*4 + $g*4 + $b + 16, map {(0, 139, 205, 255)[$_]} $r, $g, $b); } } print "\n"; } print "\n"; print '', map { colcell(80, ($_) x 3) } 46, 92, 115, 139, 162, 185, 208, 231; :>