Reply To: Colorpicker get darkness of the color

• mvaneijgen

• October 22, 2016 at 8:07 pm

I created a function based on a Stack overflow answer (can’t find the page anymore otherwise I would have linked to it).

function get_darker_or_light_class_based_on_hex ( $hex_color ) {
	$hex = str_replace( '#', '', $hex_color );

	$r = hexdec(substr($hex,0,2));
	$g = hexdec(substr($hex,2,2));
	$b = hexdec(substr($hex,4,2));

	if($r + $g + $b < 450){
		$class = 'dark-bg';
	}else{
		$class = 'light-bg';
	};
	return $class;
}

I had to change the 450 value to get it to work with my colors. And in my template part I use <?php echo get_darker_or_light_class_based_on_hex(get_sub_field('bg-color'); ?> to get the right background class.

Hope someone finds this usefull.