Open Sans in action on getfiltrapp.com

Under the hood

.header-1 { font-family: "Open Sans", sans-serif; font-size: 40px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 57px; text-transform: none; color: #9F65EA; }
.header-2 { font-family: "Open Sans", sans-serif; font-size: 20px; font-style: normal; font-weight: normal; letter-spacing: 4px; line-height: 28px; text-transform: uppercase; color: #9F65EA; }
.content-1 { font-family: "Open Sans", sans-serif; font-size: 15px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 25px; text-transform: none; color: #777777; }