terminal colour cheat sheet

<: -sub luminance { - # perceived brightness (using ITU-R recommendation 601 luma co-efficients) - my ($r, $g, $b) = @_; - return $r*.299 + $g*.587 + $b*.114; -} +use Shiar_Sheet::Colour; 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 $inverse = sprintf('%X', luminance(@rgb)/255 < .3 ? 12 : 0) x 3; - return sprintf '%s%s%s'."\n", - "background:#$rgb48; color:#$inverse", - $id, - "background:#000; color:#$rgb48", - $rgb24, - "background:#FFF; color:#$rgb48", - $rgb24, + my $name = shift; + my $col = Shiar_Sheet::Colour->new(@_); + my $minhex = $col->rgb24; + my $css = '#' . $col->rgb48; + my $inverse = '#' . sprintf('%X', $col->luminance/255 < .3 ? 12 : 0) x 3; + + my $sample = [ qw(#000 #FFF) ]; + ($name, $sample) = @$name if ref $name eq 'ARRAY'; + + my $out = sprintf('%s', + join(',', map { int } @$col), + "background:$css; color:$inverse; padding:0 1ex", + $name, + ); + $out .= sprintf '%s', "background:$_; color:$css", $minhex + for @$sample; + return "$out\n"; } my %col = ( @@ -74,15 +67,25 @@ my %col = ( qw/2E3436 CC0000 4E9A06 C4A000 3465A4 75507B 06989A D3D7CF 555753 EF2929 8AE234 FCE94F 729FCF AD7FA8 34E2E2 EEEEEC/, ], + -xkcd => [ + qw/black maroon green olive navy purple teal silver + grey red lime yellow blue fuchsia cyan white/, + ], + xkcd => [ + 0,0, + qw/000000 650021 15b01a 6e750e 01153e 7e1e9c 029386 c5c9c7 + 929591 e50000 aaff32 ffff14 0343df ed0dd9 00ffff ffffff/, + ], ); -for my $term (qw/html cga xterm tango/) { +for my $term (qw/cga xterm tango html xkcd/) { print '', "\n"; print "\n"; for my $num (0 .. 15) { my $rgb = $col{$term}[$num + 2]; - print '', - colcell($col{"-$term"}[$num] || $num, $rgb, $col{$term}[0]); + my $name = $col{"-$term"}[$num] || $num; + $name = [ $name, ['#333'] ] if $term eq 'xkcd'; + print '', colcell($name, $rgb); } print "

\n\n"; } @@ -107,10 +110,11 @@ for my $r (0 .. 3) { print "\n"; print ''; -print colcell(80, ($_) x 3) for 46, 92, 115, 139, 162, 185, 208, 231; +print colcell(80+$_, (($_ + 2 + ($_>0)) * 255/11) x 3) for 0 .. 7; print "

\n\n"; -:>

Terminal colours