<?php
declare(strict_types=1);

$image = imagecreate(2, 2);
$red = imagecolorallocate($image, 255, 0, 0);
$blue = imagecolorallocate($image, 0, 0, 255);
$index = imagecolorexact($image, 250, 0, 0);
echo $index === -1 ? "not in palette\n" : "found\n";
