How Many Colours Are There In The Universe Thank You?.?

All of them, your welcome.

There are the basic colours.

The primary colours ..

(1) RED (2) YELLOW and (3) BLUE

and the secondary colours ..

(4) ORANGE (red and yellow mixed)

(5) GREEN (yellow and blue mixed)

(6) PURPLE (blue and red mixed)

but if you have more blue than red it's (7) INDIGO .. and more red than blue is (8) VIOLET

and then red, yellow and blue makes (9) BROWN

(and so do red and green, yellow and purple .. and green and orange)

Then you have to consider (10) BLACK and (11) WHITE as colours.

adding white to orange, yellow, green, blue and purple just makes 'a lighter shade' of the same colour

but adding white to red makes a different colour that we call (12) PINK

and mixing black and white makes (13) GREY

AND THEN there are all the other colours made by using all the different combinations of all the colours mentioned above.

All the different shades of red, orange, yellow, green, blue, indigo, violet and brown could be an almost infinite number depending on how accurate the definition is.

The human eye could still probably detect millions of different shades.

255 x 255 x 255 =16,581,375 colors. The number all depends on how you want to slice up the spectrum. Now, in your question you called for all the colors in the whole universe. If there are eyes that can see all wavelengths then there would be a much larger number of colors.

Color is just a name for a particular wavelength of light. It can have any wavelength, so there are an infinite number of colors.

2^64 or more, 2^128. And that's for visible light and humans with normal tricolor vision. Some humans have 4 color, tetracolor vision using an RGB (red, green,blue) color scale. There is also a HSI color scale (hue, saturation, intensity).

There are supposedly 7 colors in a rainbow, but that usually does not include cyan (blue plus green) or magenta (red plus blue), or brown.

Humans see only very limited range of colors, like being able to hear only one octave sound. Humans are "blind" to most of the electromagnetic spectrum.

https://robmviscom1.wordpress.com/2014/05/06/funda...

Colors are simply how the human brain perceives an extreme narrow frequency band of electromagnetic energy that the human eye can detect.

The frequency range of the entire spectrum of electromagnetic energy goes from extremely low frequencies at around 3 Hz [three cycles per second] (a frequency we use to communicate to submarines deep under the ocean) to Gamma Rays at about 3000000000000000000 Hz (3 EHz). Gamma Rays occur during extremely energetic nuclear interactions and radioactive decay. Gamma Rays easily damage living tissue (not to mention turned Bruce Banner into the Hulk), which is they can cause cancer, radiation poisoning, and death.

Humans can perceive and distinguish about 7-10 million colors in the 430–750 terahertz range (where 1 terahertz is 1000000000000 Hz). RF communications (from AM radio to Satellite Communications) occurs in the range for about 3 kHz to 300 GHz. Different creatures will perceive this energy differently (as guided by their evolution), some creatures can't detect colors, some see slightly lower frequencies (infrared), some can see slightly higher frequencies (ultraviolet).

Here is a graphical representation of the electromagnetic spectrum:

https://en.wikipedia.org/wiki/Electromagnetic_spec...

Color is how we perceive different wave lengths of light. So the question is how many different colors can our eyes and mind perceive. Visible light is usually defined as having wavelengths in the range of 400–700 nanometers. Wavelengths outside of this range are not detected by our eyes. Light is a continuous spectrum but can be arbitrarily grouped into "the seven colors of the rainbow" (red, orange, yellow, green, blue, indigo, and violet. However it is not difficult to identify many different shades between any of the 7 colors. The eyes can detect very large but not infinite number of shades of colors. Perhaps as high as 100 million.

close to an infinite number. It depends on the resolution of your measurement.

For example, for a TV or monitor, 24 bit (per pixel) color has 16,777,216 total colours. 16 bits per channel means 281,474,976,710,656 total colours.

Like asking how long is a piece of string.