Hi @stoent
thank You for using Goshiki.
You can change the footer text in the customizer (Appearance-> Customize) at the Layout-> Footer section. You can also add widget to the Footer bar.
These colors are not editable in the customizer with the free theme, only with the premium add-on.
However You can add custom CSS to free version also at additional section.
You can change the header and bottom footer bg color with this code:
.site-header, .main-navigation, .main-navigation ul ul {
background-color: #5a6468;
}
.site-info {
background-color: #5a6468;
}
Change the color code as You want.
I hope it helps! Have a nice day!
Regards,
wpkoithemes