[jacobolus]

> through [...] mixing of pigments, combined with the reflection of natural light, the plants are able to generate [...] blue color

We have a way to describe objects which “generate a blue color when light shines on them”. We say they are “blue” objects.

Likewise, bird feathers or butterfly wings which absorb/reflect light based on their small-scale structure and appear blue are still called “blue”, even though they might be colorless when pulverized.

There are plenty of “blue flowers” out there.

[tipoftheiceberg]

Right, but botanically speaking, we have not found a “true blue” plant.