Examples of websites using
Dia
(Dia is a sans-serif font designed by Florian Schick and Lauri Toikka and released by Schick Toikka in 2014. The font family is available in a range of styles, including regular and condensed widths, each with multiple weights and matching italics)
with
MT Grotesque
(designed by Steve Matteson, Frank Hinman Pierpont, Monotype.Design Studio and Frank and released by Monotype in 1926)