Lato with Roboto Slab in action on everywhere.is

.header-1 { font-family: Lato, sans-serif; font-size: 42px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 53.99974060058594px; text-transform: none; color: #323232; }
.content-1 { font-family: Lato, sans-serif; font-size: 30px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 40.50008010864258px; text-transform: none; color: #323232; }
.content-2 { font-family: 'Roboto Slab', serif; font-size: 18px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 27px; text-transform: none; color: #323232; }
.content-3 { font-family: 'Roboto Slab', serif; font-size: 18px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 27px; text-transform: none; color: #323232; }
Lato is available from Font Squirrel, Google Web Fonts, Open Font Library and Typekit.

Roboto Slab is available from Font Squirrel, Google Web Fonts and Typekit.

Try this combination out in Pair and Compare.
Found by @mikesten on 13 Feb 2014.

Liked by:
@Jaytirth_Ahya @johnragon @mikesten @romero_1013 @stefunnyroar @majlind_ @pacoespinoza @DyelKassaKoumba @highfivebids @AmaliaShacharr @codecarpenter @laloalejandro1 @theguyiskevin @ChristophePas

Lato with Roboto Slab