/**
* @param $hex
* @return string
* @throws InvalidHexException
*/
private function getClosestHex($hex)
{
$RGB = $this->getRGB($hex);
$HSL = $this->getHSL($hex);
$df = -1;
$final = '';
foreach (ColorList::getAll() as $color) {
$checkRGB = $this->getRGB($color[0]);
$checkHSL = $this->getHSL($color[0]);
$rgbDiff = pow($RGB[0] - $checkRGB[0], 2) + pow($RGB[1] - $checkRGB[1], 2) + pow($RGB[2] - $checkRGB[2], 2);
$hslDiff = pow($HSL[0] - $checkHSL[0], 2) + pow($HSL[1] - $checkHSL[1], 2) + pow($HSL[2] - $checkHSL[2], 2);
$diff = $rgbDiff + $hslDiff * 2;
if ($df < 0 || $df > $diff) {
$df = $diff;
$final = $color[0];
}
}
if ($final == '') {
throw new InvalidHexException($hex);
}
return $final;
}
public function testGetAll()
{
$all = ColorList::getAll();
$this->assertGreaterThan(1564, count($all));
}
