public function contrastFromHex($hex)
    {
        $hash = '';

        if (substr($hex, 0, 1) === '#') {
            $hash = '#';
            $hex = substr($hex, 1);
        }

        $color = $this->contrastFromRGB(...sscanf($hex, '%02x%02x%02x'));

        return sprintf('%s%02x%02x%02x', $hash, $color['r'], $color['g'], $color['b']);
    }
public function contrastFromHex($hex)
    {
        $hash = '';

        if (substr($hex, 0, 1) === '#') {
            $hash = '#';
            $hex = substr($hex, 1);
        }

        $color = $this->contrastFromRGB(...sscanf($hex, '%02x%02x%02x'));

        return sprintf('%s%02x%02x%02x', $hash, $color['r'], $color['g'], $color['b']);
    }
public function contrastFromHex ( $ hex ) { $ hash = '' ; if ( substr ( $ hex , 0 , 1 ) === '#' ) { $ hash = '#' ; $ hex = substr ( $ hex , 1 ) ; } $ color = $ this -> contrastFromRGB ( ... sscanf ( $ hex , '%02x%02x%02x' ) ) ; return sprintf ( '%s%02x%02x%02x' , $ hash , $ color [ 'r' ] , $ color [ 'g' ] , $ color [ 'b' ] ) ; }
Contrast the given hex based color.

@return array
Contrast the given hex based color .