background color on click

https://www.immineo.digital/blog/

This is the website I’m editing.

While on mobile device, when clicking on a menu link, the menu item background appears blue for a second. I want to change it to #f30958 (pink), which is the main color of the website.

I’m assuming I have to edit something in JS or jQuery, since I was unable to find anything in HTML or CSS? And I’m currently lacking knowledge in JS and jQuery. Any help or advice would be appreciated!

Thanks