Open Sans in action on appbot.co

.header-1 { font-family: "Open Sans", sans-serif; font-size: 42px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 46.2px; text-transform: none; color: #FFFFFF; }
.header-2 { font-family: "Open Sans", sans-serif; font-size: 18.9px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 20.79px; text-transform: none; color: #BCD1EE; }
.header-3 { font-family: "Open Sans", sans-serif; font-size: 13.3px; font-style: normal; font-weight: 600; letter-spacing: normal; line-height: 20px; text-transform: none; color: #FFFFFF; }
.content-1 { font-family: "Open Sans", sans-serif; font-size: 14px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 20px; text-transform: none; color: #BCD1EE; }
Open Sans is available from Font Squirrel, Google Web Fonts, MyFonts and Typekit.

Try this combination out in Pair and Compare.
Found by @la_sciencefolie on 18 Aug 2017.

Liked by:
@mikesten @la_sciencefolie

Open Sans