Mark with Source Sans Pro in action on getkeepsafe.com

Under the hood

.header-1 { font-family: MarkPro, sans-serif; font-size: 39px; font-style: normal; font-weight: 700; letter-spacing: normal; line-height: 47px; text-transform: none; color: #371989; }
.header-2 { font-family: "Source Sans Pro", sans-serif; font-size: 17px; font-style: normal; font-weight: 500; letter-spacing: normal; line-height: 21px; text-transform: none; color: #371989; }
.content-1 { font-family: "Source Sans Pro", sans-serif; font-size: 15px; font-style: normal; font-weight: 100; letter-spacing: 0px; line-height: 20px; text-transform: none; color: #2E2E2E; }
.content-2 { font-family: "Source Sans Pro", sans-serif; font-size: 21px; font-style: normal; font-weight: 100; letter-spacing: 1px; line-height: 26px; text-transform: none; color: #371989; }