Examples of websites using
Euclid Flex
(designed by Emmanuel Rey and Swiss Typefaces and released by Swiss Typefaces in 2011)
with
Poppins
(Poppins is a sans-serif font designed by Jonny Pinhorn, Ninad Kale, and Indian Type Foundry in 2015. The font family features a wide range of styles, including regular, medium, bold, and black, each with matching italics)