Examples of websites using
Space Mono
(Space Mono is a monospaced font designed by Colophon. It offers a variety of styles and weights, providing a range of options for precise and consistent typography)
with
Helvetica Neue
(Helvetica Neue is a popular Sans Serif font designed by Max Miedinger and published through Linotype in 1961. The font family consists of multiple styles with different weights and matching italics)