how can I change the link color on a navbar?

how can I change the link color on a navbar?

Is there any possibility to use data-theme to a link on header navbar?

Since the link is automatically changed to a button when it's included in  a navbar, I put links in <h1>, my code is like:

  1. <div data-role="header">
  2.          <h1><a href="/m/" rel="external" data-theme="c">1/100</a></h1>
  3.          <a href="#newword" data-icon="plus" data-theme="c" data-rel="dialog" data-transition="pop" class="ui-btn-right">{% trans "add" %}</a>
  4. </div>
The color of the link 1/100 cannot be changed. If navbar use "b" as its theme, the link cannot be displayed clearly.