Roboto Mono in action on googlecreativelab.github.io

Under the hood

.header-1 { font-family: 'Roboto Mono', monospace; font-size: 25px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: uppercase; color: #000000; }
.content-1 { font-family: 'Roboto Mono', monospace; font-size: 17px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 31px; text-transform: none; color: #000000; }