Open Sans in action on modernapp.co

Under the hood

.content-1 { font-family: "Open Sans", sans-serif; font-size: 35px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; color: #FFFFFF; }
.content-2 { font-family: "Open Sans", sans-serif; font-size: 15px; font-style: normal; font-weight: 600; letter-spacing: normal; line-height: normal; text-transform: none; color: #FFFFFF; background-color: #3EBBFF; }
.content-3 { font-family: "Open Sans", sans-serif; font-size: 13px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; color: #7FC5FE; }
.content-4 { font-family: "Open Sans", sans-serif; font-size: 18px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 28px; text-transform: none; color: #FFFFFF; }