How do I change the menu color – and the dividers and the other default accents?

Hello,

How do I change the text color of the top menu?

Actually I just saw a post on how to change the menu color. Unfortunately it requires CSS code which will not be easy for my clients to manage. I really thought it would be one of the theme colors. Now the top menu text color is changed, however the dividers are not. In addition the accent line at the top of the header image remains the default theme color of mustard as well. I understood that these accents were changed by changing the default theme color pallet – but apparently not. I would really appreciate some help with this and for when I have a lot more time – is there a guide somewhere for each template?

Thank you!