Helvetica Neue with Palatino in action on dev.to

• .header-1 { font-family: "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 45px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; color: #1B1B1B; }
• .header-2 { font-family: "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 15px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: normal; text-transform: none; color: #959595; }
• .content-1 { font-family: "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 13px; font-style: normal; font-weight: bold; letter-spacing: normal; line-height: normal; text-transform: none; color: #09133E; background-color: #FED500; }
• .content-2 { font-family: Palatino, "Palatino Linotype", "Palatino LT STD", "Book Antiqua", Georgia, serif; font-size: 21px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 32px; text-transform: none; color: #1B1B1B; }

Palatino is available from Fonts.com and MyFonts.