wrote:

Red green and blue are defined scientifically as primary colors. I
don't know where those standards came from, nor do I care

You may not care, but I'm going to tell you anyway

It's from Biology, not physics; RGB are the peak sensitivities of the
three colour receptors in the most common human retina. We're so poor
at telling them apart that a red-green mix looks pretty much like some
kind of yellow. (Narrow spectrum lamps are fine for TV, but they can
make your wallpaper look a bit odd, which is one of the CFL problems)

Most common sort? Well, colour blindness is an obvious case. But
apparently a few women have 4-colour vision.

And for true colour accuracy (though without speed or much resolution)
look at the Mantis Shrimp. IIRC it has sensors for polarisation and a
complete spectrometer build into its eye.

Andy

Andy Champ coughed up some electrons that declared:

wrote:

Red green and blue are defined scientifically as primary colors. I
don't know where those standards came from, nor do I care

You may not care, but I'm going to tell you anyway

It's from Biology, not physics; RGB are the peak sensitivities of the
three colour receptors in the most common human retina. We're so poor
at telling them apart that a red-green mix looks pretty much like some
kind of yellow. (Narrow spectrum lamps are fine for TV, but they can
make your wallpaper look a bit odd, which is one of the CFL problems)

Most common sort? Well, colour blindness is an obvious case. But
apparently a few women have 4-colour vision.

Just out of interest, what's the 4th colour?

And for true colour accuracy (though without speed or much resolution)
look at the Mantis Shrimp. IIRC it has sensors for polarisation and a
complete spectrometer build into its eye.

I'm getting that "Geordie" moment

In message , Tim S
writes
Andy Champ coughed up some electrons that declared:

wrote:

Red green and blue are defined scientifically as primary colors. I
don't know where those standards came from, nor do I care

You may not care, but I'm going to tell you anyway

It's from Biology, not physics; RGB are the peak sensitivities of the
three colour receptors in the most common human retina. We're so poor
at telling them apart that a red-green mix looks pretty much like some
kind of yellow. (Narrow spectrum lamps are fine for TV, but they can
make your wallpaper look a bit odd, which is one of the CFL problems)

Most common sort? Well, colour blindness is an obvious case. But
apparently a few women have 4-colour vision.

Just out of interest, what's the 4th colour?

Octarine, of course ...


--
geoff

"Andy Champ" wrote in message
. uk...

Most common sort? Well, colour blindness is an obvious case. But
apparently a few women have 4-colour vision.

Is that why they take so long choosing anything from curtains to shoe colour
?
And then change their mind again, to the one they liked 4 hours ago.