Question

How many fosimary colours are there
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Answer 1

Three

colorimetry. The three additive primary colours are red, green, and blue; this means that, by additively mixing the colours red, green, and blue in varying amounts, almost all other colours can be produced, and, when the three primaries are added together in equal amounts, white is produced.

Answer 2

Answer:

But elementary school finger painting teaches us that there are three primary colors—red, yellow and blue—that combine to make three secondary colors—orange, green and purple—and (plus or minus some black and white paint) every other color imaginable. That's six basic colors.