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Traditionally, seven. Red, orange, yellow, green, blue, indigo and violet. Those are

the main colours. There are possibly over 300 colours in the rainbow, since they all

blend into each other, so each different shade is a colour.

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Answer #2:

All of them are ... every color that anyone has ever seen, or that can be seen.

There's no limit to the number.

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12y ago

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