Change Pink color in Hello Elementor theme

Hello team,

We need to change the primary color in Hello Elementor there which is Pink color, we’re using css to do that without touching theme files

do you have another option to do that without touching theme files?
and can this problem fixed with a child theme?

Kindly let me know if this problem can be fixed with a child theme and let me know if there is an official child theme for hello elementor.

The page I need help with: [log in to see the link]