for ($red = 0; $red < 6; $red++) {
for ($green = 0; $green < 6; $green++) {
for ($blue = 0; $blue < 6; $blue++) {
printf("\x1b]4;%d;rgb:%2.2x/%2.2x/%2.2x\x1b\\",
16 + ($red * 36) + ($green * 6) + $blue,
($red ? ($red * 40 + 55) : 0),
($green ? ($green * 40 + 55) : 0),
($blue ? ($blue * 40 + 55) : 0));
}
}
}
for ($gray = 0; $gray < 24; $gray++) {
$level = ($gray * 10) + 8;
printf("\x1b]4;%d;rgb:%2.2x/%2.2x/%2.2x\x1b\\",
232 + $gray, $level, $level, $level);
}
print "System colors:\n";
for ($color = 0; $color < 8; $color++) {
print "\x1b[48;5;${color}m ";
}
print "\x1b[0m\n";
for ($color = 8; $color < 16; $color++) {
print "\x1b[48;5;${color}m ";
}
print "\x1b[0m\n\n";
print "Color cube, 6x6x6:\n";
for ($green = 0; $green < 6; $green++) {
for ($red = 0; $red < 6; $red++) {
for ($blue = 0; $blue < 6; $blue++) {
$color = 16 + ($red * 36) + ($green * 6) + $blue;
print "\x1b[48;5;${color}m ";
}
print "\x1b[0m ";
}
print "\n";
}
print "Grayscale ramp:\n";
for ($color = 232; $color < 256; $color++) {
print "\x1b[48;5;${color}m ";
}
print "\x1b[0m\n";