Does this meet PEER Reviewed Paper criteria? Looks like it does. Dr.M.is one of credited people contributors. First Published 16 June 2023 (last Friday) .
The paper doesn't have any inherent colour property.
WHAT COLOR IS THIS RED PIECE OF PAPER???
The concept of red is based on the reflections from the paper of photons hitting the retina and then interpreted by the brain as a colour based on light's wavelength.
Some people are colour blind, have synaesthesia interpreting various signals mixed up between senses or other kinds of different wiring. Much in the same way as biotech investor brains seem to make up all sorts of interpretations based on the same information about $AVXL being available to them all.