how is indigo a color in the rainbow?

Question

Growing up, I was taught that rainbows have 6 colors. Red, orange, yellow, green, blue, and purple. It makes sense as it goes from primary color (red) to secondary color (orange) back to primary (yellow) back to secondary (green), to primary (blue) and finally ending on secondary (purple). Indigo is a blend of blue and purple, but purple is a blend of red and blue…..

In: Physics

Answer 1

> primary color (red) to secondary color (orange) back to primary (yellow) back to secondary (green), to primary (blue) and finally ending on secondary (purple)

That’s the wrong structure of colors often taught in schools and other places. Depending on your view the primary colors are either red, green, blue (additive mixing) or magenta, yellow, cyan (subtractive mixing). Yellow is an additive mixture of green and red, which is what your monitor does.