If Graphene has the facility to do this, I think that is great
Graphene Theme Options >> Display Options >> Text Style Options
Enter a font in the boxes labeled “Title text font” and “Description text font”.
i would just like to know what I may have done.
Have you entered any fonts in those boxes? If so, which fonts?
Have you entered any values in the “Google Webfonts” box? If so, what?
What font do you want these things to be displayed in?