How to change the color? It does not work/ Responsive navigation

Hi

I try to change the color of the theme. If I choose another preset color like yellow the color changes only on single blog posts but not on the front page.

If I choose custom color nothing happens even on the single blog post page. I choosed the “many color square” and than entered the hex code of my custom color in every field and saved but nothing happened.

Another problem is the navigation/menu on smartphones. If you click on the menu icon the menu is opened perfectly but you can’t close it anymore without choosing a menu element. You have to go back to the previous site or enter the site URL again…