choices_type ) { case 'select' : { ?> _hex; // Calculate straight from rbg $r = hexdec($color[0].$color[1]); $g = hexdec($color[2].$color[3]); $b = hexdec($color[4].$color[5]); return (( $r*299 + $g*587 + $b*114 )/1000 > 130); } }