What is the number of solar spectrum colors six or seven?

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Hassan Abd

seven red, orange, yellow, green, blue, indigo, and violet

Nada Farhan Kadhim

Hi Hassan,

In most english refreances I read the color indlgo is not exist . They merge it with blue, because they are identical so the color is only 6 , not like in arabic refreanes they always 7. Now if some one ask some one about the number which number must he choose.

Shatha S Alhily

Dear Dr.Nada

At least to my knowledge, are six colours.

-Shatha