Krzysiek Dróżdż

Hi,

Could you show us your current code? It’s a little bit hard to say anything without seeing your current work.

You can use either <select> field or list of <input type="checkbox"> – it’s just a usability/UI choice. And which way will you go should depend on how many categories are there, and so on.

It’s a little bit hard to say, how to fix it with your theme, because you haven’t tell us what theme are you using.

But… You can still easily fix it with custom CSS.

Go to Appearance -> Customize and open tab called «Additional CSS». Then add this to the edit field in there:

.top-bar-dark .right-top-bar a {
    background: #333;  // change to whatever color you want
}
.footer-col-3 ul.social-dark li a {
    background: #333;  // change to whatever color you want
}

Then click on the «Publish» button and your changes will be visible on your site.