Post Navigation Green Buttons

Unless your theme has some settings to change the color you could override the .nav-link a class with CSS.

Like so:

.nav-link a {
  background: white;
  box-shadow: none;
}

If you want the button itself to be white then you might need to change the text color to something darker though.

Thanks Eva. That worked perfectly :).

Glad to hear it ?? Good luck with your site!