Fira Mono with Share Tech Mono in action on uxbrutalism.com

Under the hood

.header-1 { font-family: "Share Tech Mono"; font-size: 30px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: 39px; text-transform: none; color: #212121; }
.content-1 { font-family: "Fira Mono"; font-size: 15px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: 25px; text-transform: none; color: #424242; }