I am not claiming anything, just noting that I see something that looks like
a pattern and trying to test if it has substance ...

FWIW all websites treating farkleberry seem to describe the berries as
black, eg
http://www.floridata.com/ref/V/vacc_arb.cfm
PvR

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Monique Reed schreef
Farkleberries (Vaccinium arboreum) don't count as blue? If Callicarpa
counts, those should.
Monique

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P van Rijckevorsel wrote:
Compared to what passes for blue in animal husbandry the blue in
Callicarpa is a pretty clear blue :-)

A quick try for "drupe" and "blue" in a search engine turned up quite a
few hits, each in a separate family. On the other hand "blue" and "berry"
was a non-starter.