Fonts

System font stack

Sans-serif

font-family: -apple-system, BlinkMacSystemFont, avenir next, avenir, segoe ui, helvetica neue, helvetica, Cantarell, Ubuntu, roboto, noto, arial, sans-serif;

Serif

font-family: Iowan Old Style, Apple Garamond, Baskerville, Times New Roman, Droid Serif, Times, Source Serif Pro, serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol;

Mono

font-family: Menlo, Consolas, Monaco, Liberation Mono, Lucida Console, monospace;

• Modern Font Stacks - System font stack CSS organized by typeface classification for every modern OS.
• System font stack

Resources

• Typewolf - what's trending in type
• Fixel
• B612 - B612 is an highly legible open source font family designed and tested to be used on aircraft cockpit screens.
• Bookerly - Serif font used by Kindle
• Atkinson Hyperlegible Font