Changing site layout colours

GREETINGS!

As the titles goes, i am looking to change the sites layout yellow/blue colours... but have no idea how. Any ideas on how i go about doing it?
A response would be much appreciated! Thanks in advance.

Hi!

Here is an article on how to change the theme background:
https://smthemes.com/blog/browser-devtools-is-at-your-service-or-how-to-change-theme-colors/
Unfortunately, we don't provide any services paid or unpaid for editing themes for individual users.