function ChangeLuminosity($RGB, $LuminosityPercent)
{
$HSL = RGBToHSL($RGB);
$NewHSL = (int) ((double) $LuminosityPercent / 100 * 255) + (0xffff00 & $HSL);
return HSLToRGB($NewHSL);
}
function grid_get()
{
$GR = 5;
for ($i = 0; $i <= 360; $i += $GR) {
$H = $i;
$coiso = '<div style="width: 400px; float: left; margin: 2px;"><h2>' . $H . '</h2>';
echo $coiso;
// echo 'H:'.$H.'<br>';
for ($s = 100; $s >= 0; $s -= $GR) {
$S = $s;
// echo 'S:'.$S.'<br>';;
for ($l = 100; $l >= 0; $l -= $GR) {
$L = $l;
// echo 'L:'.$L.'<br>';;
$HSL = array('H' => $H, 'S' => $S, 'L' => $L);
$RGB = HSLToRGB($HSL);
// var_dump($RGB);
$R = $RGB['R'];
$G = $RGB['G'];
$B = $RGB['B'];
$swatch = '<div style="line-height: 20px; text-align: center; width: 40px; height: 40px; float: left; background-color: rgb(' . @$R . ',' . @$G . ',' . @$B . ')">S:' . $S . '<br>L:' . $L . '</div>';
echo $swatch;
// var_dump($HSL);
}
}
echo '</div>';
}
}