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The common confusion | 151 comments | Create New Account
Comments belong to whoever posts them. Please notify us of inappropriate comments.
The common confusion
Authored by: stegu on Friday, August 24 2012 @ 04:24 AM EDT
You are confusing color mixing with color
perception. Yes, you can mix blue and yellow paint
to make green, but to a child, it looks like
magic the first time they see it. Mixing blue
and red to make purple, mixing red and yellow to
make orange or mixing white and black to make gray
are all much more obvious and natural, because
purple is perceived by the mind as a "reddish blue",
orange as a "reddish yellow" and gray as a
"blackish white".

The human mind is not prone to associating
"green" with "bluish yellow". In fact, the
concept "bluish yellow" does not make sense
to the brain, other than in terms of knowing
by experience what you get from mixing blue
and yellow watercolors.
(Mixing blue and yellow light makes white,
which is another counter-intuitive effect
that is put to practical use in white LEDs.)

The brain is also not prone to associating
yellow light with a mix of red and green
light, but that is how yellow is created
on a computer screen. Your "blue+yellow=green"
example is a quite counter-intuitive result of
subtractive color mixing, and my example
"red+green=yellow" is a counter-intuitive result
of additive color mixing.

Please don't try to refute well established science
with less than well informed opinions. Believe
me when I say that I am an expert on this. It
is complicated, to some extent it remains confusing
even to experts, and it requires some reading
to understand. These links should be good reading:

http://en.wikipedia.org/wiki/Natural_Color_System
http://www.ncscolour.com/en/ncs/

There are other color systems in existence, but
NCS is the one that is purely based on perception
and does not confuse color mixing technicalities
with human color perception. It is difficult
not to confuse the two, but they are separate.

(Thanks for reading. This subject is dear to me.)

[ Reply to This | Parent | # ]

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