Open Sans with caslonthree in action on kingestate.com

Under the hood

.content-1 { font-family: CaslonThreeLT-Italic, Georgia, serif; font-size: 70px; font-style: normal; font-weight: 500; letter-spacing: normal; line-height: 126px; text-transform: none; color: #000000; }
.content-2 { font-family: CaslonThreeLT-Roman, Georgia, serif; font-size: 22px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 30px; text-transform: none; color: #18191D; background-color: #F5F5F5; }
.content-3 { font-family: open_sansregular, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 19px; text-transform: none; color: #FFFFFF; background-color: #18191D; }