Thanks, so much for your help. I was trying to edit the original stylesheet and wasn’t getting any results. I did the custom css through jetpack and copied the code you provided and that did it!
I increased the font-size to 1em. Of course that increases the overall size of the header. To compensate for the enlarged icon and keep the header the original size I am guessing I need to reduce the icon’s margin, yes? Could you show me what that would look like?