Mercury with Whitney in action on pudding.cool

Under the hood

.content-1 { font-family: "Mercury SSm A", "Mercury SSm B"; font-size: 50px; font-style: normal; font-weight: 500; letter-spacing: normal; line-height: 58px; text-transform: none; color: #0A061B; }
.content-2 { font-family: "Mercury SSm A", "Mercury SSm B"; font-size: 15px; font-style: normal; font-weight: 400; letter-spacing: 0px; line-height: 22px; text-transform: none; color: #000000; }
.content-3 { font-family: "Whitney SSm A", "Whitney SSm B"; font-size: 11px; font-style: normal; font-weight: 500; letter-spacing: normal; line-height: 17px; text-transform: none; color: #000000; }

Mercury is available from Fonts.com and MyFonts.

Whitney is available from MyFonts.