Styling the dynamic text

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I open my contact form in a frame

I want a title for my frame so I use the code like this
<h2>Contact about [dynamictext Poste id:position-application "CF7_get_post_var key='title'"]</h2>

How can I style [dynamictext Poste id:position-application “CF7_get_post_var key=’title'”] to show with the same style as my h2 and not as a text-field?

Thank you for helping