I would like to modify how my post page looks

Hi

I would like to modify how my post page looks, I’m trying to get rid of the big sky blue header right at the top of my posts page, I’m using colibri WP theme PRO.

Any help on how to do this is very much appreciated.

When i go to the single.php file I see that –>

|
<?php get_header(); ?>
<?php colibriwp_theme()->get( ‘single’ )->render(); ?>

<?php get_footer();
|

–
<?php colibriwp_theme()->get( ‘single’ )->render(); ?> = what file ? where is ?
–

I want change change the global template of post for all posts.
Thanks