MailContact::getRandomColor

static function getRandomColor()
{
	static $colors = null;
	if (is_null($colors))
	{
		$reflect = new ReflectionClass(static::class);
		foreach ($reflect->getConstants() as $name => $value)
		{
			if (strncmp($name, 'COLOR', 5) === 0)
			{
				$colors[] = $value;
			}
		}
	}
	return $colors[rand(0, count($colors) - 1)];
}