Source Sans Pro in action on jessepollak.me

Under the hood

.header-1 { font-family: 'Source Sans Pro', serif; font-size: 60px; font-style: normal; font-weight: bold; letter-spacing: normal; line-height: 60px; text-transform: none; color: #0071AD; }
.content-1 { font-family: 'Source Sans Pro', serif; font-size: 14px; font-style: normal; font-weight: 100; letter-spacing: 2px; line-height: 23px; text-transform: uppercase; color: #B4B4B4; }
.content-2 { font-family: 'Source Sans Pro', serif; font-size: 20px; font-style: italic; font-weight: normal; letter-spacing: normal; line-height: 33px; text-transform: none; color: #333333; }
.content-3 { font-family: 'Source Sans Pro', serif; font-size: 20px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 33px; text-transform: none; color: #333333; }