Reminder Ribbon U+1F397

The Unicode standard for the Reminder Ribbon character (U+1F397) does
not appear to specify or suggest a color for the ribbon (the glyph
shown in the code chart is black, like other characters there).
Platforms that support this character among the other emojis do
however assign a color to it, as seen in character pick lists as well
as where the character is shown in sent or received messages. This,
however, is not done with any consistency; different platforms have
used yellow, blue, and red ribbons, as shown here:

https://emojipedia.org/reminder-ribbon/

Different colors have different associations when used in various
campaigns and movements; some are listed here:

https://en.wikipedia.org/wiki/List_of_awareness_ribbons

This can produce confusion when somebody uses the character (e.g., in
a tweet or text message) in association with a campaign that uses the
color that happens to match that used in the sender's platform (for
instance, yellow ribbons have been in current use to call for release
of Catalan prisoners held by Spain) but a reader of the message on a
different platform sees it differently, with a color that might have
different associations.

Perhaps a larger set of ribbon characters, with defined colors for
each, is called for? Or is this better done by creating composite
characters with the existing ribbon character combined with a
color-specifying code point?

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