Headings are using modular scaling between 20rem and 62rem. The ratio is set from 1.25 @ 20rem to 1.333 @ 62rems. h1 to h4 have a line height of 1.1 while h5/h6 have a line height of 1.5.

Example

h1

The quick brown fox jumped over the fence.

h2

The quick brown fox jumped over the fence.

h3

The quick brown fox jumped over the fence.

h4

The quick brown fox jumped over the fence.

h5

The quick brown fox jumped over the fence.

h6

The quick brown fox jumped over the fence.