terminal colour cheat sheet

Terminal colours

<: sub luminance { # perceived brightness (using ITU-R recommendation 601 luma co-efficients) @@ -38,8 +34,9 @@ sub colcell { my $rgb48 = ''; $rgb48 .= sprintf '%02X', $_ for @rgb[0..2]; my $inverse = sprintf('%X', luminance(@rgb)/255 < .3 ? 12 : 0) x 3; - return sprintf '%s%s%s'."\n", - "background:#$rgb48; color:#$inverse", + return sprintf '%s%s%s'."\n", + join(',', map { int } @rgb[0..2]), + "background:#$rgb48; color:#$inverse; padding:0 1ex", $id, "background:#000; color:#$rgb48", $rgb24, @@ -48,7 +45,7 @@ sub colcell { } my %col = ( - -name => [ + -html => [ 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 @@ -77,56 +74,67 @@ my %col = ( ); for my $term (qw/html cga xterm tango/) { - print '

', "\n"; print '', "\n"; print "\n"; for my $num (0 .. 15) { my $rgb = $col{$term}[$num + 2]; print '', - colcell($term eq 'html' ? $col{-name}[$num] : $num, $rgb, $col{$term}[0]); + colcell($col{"-$term"}[$num] || $num, $rgb, $col{$term}[0]); } - print "

\n\n"; + print "\n\n"; } -:>

88-colour space

+ +

88-colour space

<: for my $r (0 .. 3) { - print '

'; + print '

'; for my $g (0 .. 3) { print ''; for my $b (0 .. 3) { - print colcell($r*4*4 + $g*4 + $b + 16, map {(0, 139, 205, 255)[$_]} $r, $g, $b); + my $index = $r*4*4 + $g*4 + $b + 16; + print colcell($index, 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; +print '

'; +print colcell(80+$_, (($_ + 2 + ($_>0)) * 255/11) x 3) for 0 .. 7; print "

\n\n"; -:>

256-colour space

+ +

256-colour space

<: for my $r (0 .. 5) { - print '

'; + print '

'; for my $g (0 .. 5) { print ''; for my $b (0 .. 5) { - print colcell($r*6*6 + $g*6 + $b + 16, map { $_ && $_*40 + 55 } $r, $g, $b); + my $index = $r*6*6 + $g*6 + $b + 16; + print colcell($index, map { $_ && $_*40 + 55 } $r, $g, $b); } } print "

\n"; } print "\n"; -print '

', (map { colcell(232+$_, ($_*10 + 8) x 3) } $_ .. $_+11), "

\n" - for 0, 12; +for my $row (0, 12) { + print ''; + print colcell(232+$_, ($_*10 + 8) x 3) for $row .. $row+11; + print "

\n"; +} print "\n"; -:>