See https://developer.mozilla.org/en-US/docs/Web/CSS/%3Aindeterminate ## To Do - [x] Create indeterminate styles - https://github.com/uswds/uswds/pull/5549 - [x] Cleanup storybook previews - https://github.com/uswds/uswds/pull/5650 - [x] Create high contrast styles - https://github.com/uswds/uswds/pull/5648