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.
PvR

Monique Reed schreef
Our Callicarpa berries are anything but blue. They're a particularly
vivid shade of screaming pinkish-purple, a color not found elsewhere
in nature, I think, except in orchids and some tropical fish.

Monique

P van Rijckevorsel wrote:

Callicarpa does not have berries, but drupes.
I am wondering if the blue color is somehow connected with this.
Prunes also tend to be blue and also are drupes.
Just idly wondering.
PvR