base, swsh, sv. Fetching one returns its expansions inline,
ordered by release date, which makes a series the natural entry point for a browse.
object | null
{ low, high }, or null where no logo is available. The two may be the same URL.string[] | null
Up to four dominant colours from the logo, most prominent first, as
#rrggbb, for gradients and
accents drawn from the artwork rather than picked by hand. null where there is no logo or it
yields no colour. See the expansion object for the full rules. They are
identical, and each expansion carries its own.