Bob Blaylock
Diamond Member
- Aug 22, 2015
- 33,988
- 26,982
The spectrum has some 16 million colors, and it's as if you can only see the pigments of red, yellow, and blue. If you can't see the wonderful nuance of ochre, cadmium, burnt umber, sienna and thalo green/blue, etc., etc., etc., what palette of joy can ever come to you, intellectually?
The human eye only sees three colors, red, green, and blue. Our eyes have sensors that are sensitive primarily to red, sensors that are primarily sensitive to green, and sensors that are primarily sensitive to blue. The brain interpolates all the other colors, based on the different levels we see of red, green, and blue.
That is why we can make usable displays, that only put out those three colors. Look at your screen under heavy magnification, and you'll see that the entire image is just made up of discrete red, blue, and green components.
That sixteen-million number, by the way, is artificial bullshit. It's not based on any really about how many colors there actually are, but on a common way of representing them in a digital format, as eight bits, or 256 levels, for each of red, green, and blue. Twenty-four bits total, per pixel. 2²⁴=16,777,216. My Nikon D3200 records 12 bits for each color, for a total of 36 bits to represent the color range that it can record. 2³⁶=68,719,476,736. So my camera can “see” over sixty-eight billion colors.
I know of some graphic formats that will store up to 16 bits per RGB color component, 48 bits per pixel. 2⁴⁸=281,474,976,710,656, or over two hundred eighty-one trillion.
The reality is that color is an analog phenomenon, and until we try to convert and store it in a digital manner, the number of actual colors is infinite and continuous.