Roboto with Roboto Mono in action on perspectiveapi.com

.header-1 { font-family: "Roboto Mono", mono-space; font-size: 14px; font-style: normal; font-weight: 500; letter-spacing: 0.7px; line-height: 18px; text-transform: none; color: #FFFFFF; }
.header-2 { font-family: "Roboto Mono", mono-space; font-size: 24px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 36px; text-transform: none; color: #FFFFFF; }
.content-1 { font-family: Roboto, sans-serif; font-size: 16px; font-style: normal; font-weight: normal; letter-spacing: 0.704px; line-height: 24px; text-transform: none; color: #FFFFFF; }
.content-2 { font-family: Roboto, sans-serif; font-size: 14px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 21px; text-transform: none; color: #424242; }
.content-3 { font-family: Roboto, sans-serif; font-size: 14px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 21px; text-transform: none; color: #424242; }
Roboto is available from Font Squirrel, Google Web Fonts and Typekit.

Roboto Mono is available from Google Web Fonts and Typekit.

Try this combination out in Pair and Compare.
Found by @mikesten on 25 Feb 2017.

Liked by:
@mikesten @biancarockr @ServerCobra @seankmchenry @rouse_kendra

Roboto with Roboto Mono