Open Sans with Roboto in action on rebelmail.com

Under the hood

.header-1 { font-family: 'Open Sans', sans-serif; font-size: 74px; font-style: normal; font-weight: 900; letter-spacing: 1px; line-height: 74px; text-transform: uppercase; color: #FFFFFF; }
.header-2 { font-family: Roboto, sans-serif; font-size: 19px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 25px; text-transform: none; color: #FFFFFF; }
.content-1 { font-family: Roboto, sans-serif; font-size: 14px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 20px; text-transform: none; color: #696969; background-color: #FFFFFF; }
.content-2 { font-family: Roboto, sans-serif; font-size: 11px; font-style: normal; font-weight: bold; letter-spacing: 1px; line-height: 20px; text-transform: uppercase; color: #FFFFFF; background-color: #364147; }