I'm trying to change the font of the "subscribe" button on my site. I'm wanting to put the button into one of the two Google fonts that the rest of my site is in (in this case, Jacques Francois). I've successfully added the Alegreya SC to anything that is a "label" or "span" using the following code in the CSS Stylesheet Editor area:

label {
font-family: "Alegreya SC", arial, sans-serif;
}

span {
font-family: "Alegreya SC", arial, sans-serif;
}

I can't seem to figure out what to call the subscribe button to make the change to a Google font (right now it appears to be using Arial). My blog is http://www.sallycreates.com/ Any help would be greatly appreciated. Thank you!

since you are using a jetpack form, it's nothing you can change in teh theme options. You can add some CSS to the ATO->Add HTML?CAA Inserts->CSS Inserts to override the jetpack CSS.

You should use a code examiner like FireBug in FireFox to see what CSS is being used and what you will need to override it.