Hello @rubylily,
I’ve changed menu items color in 8Theme Options > Styling > Navigation > Main Navigation links > Regular.
Then I’ve changed breadcrumbs for Shop page in Pages > edit Shop page > Breadcrumbs Style > Background large and updated the page.
Please clear browser cache and check your site.
Also please read our documentation to know how to work with 8Theme Options.
Thank you.
Regards,
Eva Kemp.