Colors page: Update static content to show tokens
This page does not point to the latest Design tokens and requires additional changes to explain the semantic layer vs base vs palette.
One thing I noticed was that all the swatches seem to point to black.
This can probably also be closed by https://github.com/patternfly/patternfly-org/pull/4143, except that PR is only linking to tokens docs -- it doesn't explain token layers on its own. But that could be integrated
@andrew-ronaldson or @lboehling do you want anything else added to the color page before GA release?
Closed by https://github.com/patternfly/patternfly-org/pull/4143