Rerouted (regenerated, verified). Same repository and tag, but GitHub now builds the zip with different bytes, so it no longer matches the SHA-1 package.elm-lang.org recorded. The Lamdera package server serves a copy recovered from https://github.com/NoRedInk/noredink-ui.
What we checked: Tag 22.6.0 is still on github.com/NoRedInk/noredink-ui; its commit 7cae53f1af4b is from 2023-03-24 17:13 UTC, before the version was published (2023-03-27 14:55 UTC); elm.json is byte-identical to package.elm-lang.org's; the exposed modules match docs.json; the zip's SHA-1 is not the published one (GitHub's zip no longer comes out byte for byte the same), so the contents were checked instead.
The Lamdera compiler uses this copy and prints a one-line notice saying so. elm itself fails to download this version.
Details · package.elm-lang.org's zip: https://github.com/NoRedInk/noredink-ui/zipball/22.6.0/
Predefined color palettes for use in configurable components
White palette (borders are blue)
Gray palette
Dark Gray palette
Blue palette
Dark blue palette
Purple palette
Turquoise palette
Green palette
Red palette
Aqua palette
Cornflower palette