Examples of websites using
Open Sans
(Open Sans is a sans-serif font designed by Steve Matteson. It offers a wide range of styles, including regular, italic, bold, bold italic, and light)
with
Frank Ruhl Libre
(Frank Ruhl Libre is a serif font designed by Yanek Iontef and released in 2017. It is a revival and expansion of the original Frank-Rühl font. The family includes multiple weights and styles)