Inherit custom fields

Hi,

How do I inherit advanced custom fields from a page into a a custom single page template?

I have tried:
<img class="page-image" src="<?php the_field('page_image'); ?>" />

and

<?php $color = get_post_meta($post->post_parent, 'page_image', true);
		echo $color;

		var_dump($color);
		?>

the var_dump returns bolean false.

any ideas?

https://www.ads-software.com/plugins/advanced-custom-fields/