Open Sans in action on teamstoryapp.com

.header-1 { font-family: 'Open Sans', sans-serif; font-size: 50px; font-style: normal; font-weight: 300; letter-spacing: -2px; line-height: 50px; text-transform: none; color: #1FBF92; }
.header-2 { font-family: 'Open Sans', sans-serif; font-size: 21px; font-style: normal; font-weight: 200; letter-spacing: normal; line-height: 21px; text-transform: none; color: #25272B; }
.content-1 { font-family: 'Open Sans', sans-serif; font-size: 19px; font-style: normal; font-weight: 100; letter-spacing: normal; line-height: 27.142858505249023px; text-transform: none; color: #5D5D5E; }
Open Sans is available from Font Squirrel, Google Web Fonts, MyFonts and Typekit.

Try this combination out in Pair and Compare.
Found by @mikesten on 8 Apr 2014.

Liked by:
@mikesten @mike1701 @pacoespinoza @CodyMonson @PolytechAbroad @Chloe_V_Upton

Open Sans