Can I change the grey logo and menu header to a picture ?

Got some questions about changing stuff using this theme:

1. Can I change the grey 'logo and menu' header/bar to a picture banner ?
2. If yes, how can I change the menu font and color + background color so it matches the picture ?
3. How can I change the font color of the webpages to black (it's now light grey and hard to read)

PS Your previous CSS changes don't seem to do anything...

Thanks for your help
Steven

 

Hello Steven,

It is not possible to add image in the menu background because it will affect mobile view of your site.
To change font of the website

Code:

body {
    color:your font color;
    }