Theme Hemingway Accent Color Trouble

Hello!

I’m excited to be using the Hemingway theme, and really like the beautiful design. However, I would like to be able to change the accent color, as it doesn’t exactly go with my “theme” of the site. I notice in the customization panel there is an option for “colors” and when I click on it, it drops down the reveal “Background Color” and “Accent Color.”

However, when I try to click on either one of these, nothing happens. Nothing. I know this is built into the theme and that’s why I’m wondering why I’m not getting any response.

Any help would be very appreciated!
Thank you.