Changing Page Header Title and Subtitle font and size

I’m using the Salient theme and I’m trying to adjust the font, size, color, emphasis (etc) of the Page Header Title and the Page Header Subtitle. I’ve searched through various support forums for css code that I could use but nothing seems to be working. Unfortunately nothing I have found is specifically for the Salient theme. Can someone please provide some guidance?

The page I need help with: [log in to see the link]