terminal colour cheat sheet

Terminal colours

<: sub luminance { # perceived brightness (using ITU-R recommendation 601 luma co-efficients) @@ -38,8 +35,9 @@ 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, @@ -77,7 +75,6 @@ my %col = ( ); for my $term (qw/html cga xterm tango/) { - print '

', "\n"; print '', "\n"; print "\n"; for my $num (0 .. 15) { @@ -85,15 +82,17 @@ for my $term (qw/html cga xterm tango/) { print '', colcell($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) { @@ -105,16 +104,19 @@ for my $r (0 .. 3) { } print "\n"; -print '

'; -print colcell(80, ($_) x 3) for 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) { @@ -127,21 +129,24 @@ for my $r (0 .. 5) { print "\n"; for my $row (0, 12) { - print '

'; + print '

'; print colcell(232+$_, ($_*10 + 8) x 3) for $row .. $row+11; print "

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