How many colours are there?

Colour, it’s something that we see and use every day. But how many colours are there?

We see and use colour every day
The best answer I can give is there is an infinite amount!

Conventionally there are seven basic colours in the spectrum - Red, Orange, Yellow, Green, Blue, Indigo, and Violet.

But, the colours in the spectrum blend into each other, so you could say that there are thousands of colours in the spectrum, and each of these colours has its own subset of colours.

The Colour Spectrum
But let’s say we work predominately in web or print work, for this your answer might be 3 or 4.

Why only 3 or 4?

Ok, the 3 colours RGB, Red, Blue and Green, are the additive primary colours that are output from your PC monitor, TV or mobile phone. When added together in varying intensities these primary colours can produce a whole subset of different colours, including white.

The 4 colours, Cyan, Magenta, Yellow and Black are used for producing print work. Colour printers use CMYK printer ink to produce countless secondary colours through a range of different printing techniques such as halftones, pantones, etc. Although manufacturers are increasingly adding more colour ink cartridges to their range such as, orange, red, blue, green and even grey printer ink.
RGB, Red, Blue and Green, are the additive primary colours
CMYK, Cyan, Magenta, Yellow and Black are the subtractive colours

How many colours would you say there are? Is it possible to provide a definite answer?

How many colours? 


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