Examples of websites using
Aperçu Mono
(Aperçu Mono is a monospace font designed by The Entente and released by Colophon Foundry in 2012. The font family consists of multiple styles, including regular and bold weights with matching italics)
with
Source Sans Pro
(Source Sans Pro is a Sans Serif font designed by Paul D. Hunt. The font family includes six styles, each with regular, italic, bold, and bold italic variations, providing a versatile range of options for designers)