The sky is blue and the sun is white. But on earth it looks yellow in the afternoon and red and orange during the morning and evening.

The explanation has to do with the atmosphere. As the day goes on the blue light is scattered. Then the yellow light. Then the orange light. And then only the red light is left.

But what about green? Where is it? When the sky is blue at noon, there is red, orange, yellow, and green light coming to us. Does the red-orange light mix with the green to make yellow which just mixes with the yellow light to make the sun look yellow? And when the green starts getting more scattered us the sun goes down, does the red and orange stop mixing as much and starting showing itself?

maybe overshadowed by the other bigger colors :m:

Don't they all take a fair share of the rainbow pie?

There is a phenomenon known as the "green flash", which can sometimes be seen at sunset (I think).

As an amateur astronomer, it has always been a source of disappointment to me that there are no green stars;
there are red, orange, yellow, white, blue stars,
and even brown dwarfs-
although if you saw one you would thnk it just a very faint red colour;
there are no green stars;
Zubenalshamali in Libra is supposed to be green, but in fact it is just a faintly green tinged white star.

The reason or this is to do with the relationship between temperature and radiation; the stars that would be green are also strong emitters in red and blue, so appear white.
Nevertheless I look at distant green traffic lights and think - wouldn't it be nice to see a truly green star in the heavens.

__________________
SF worldbuilding at
http://www.orionsarm.com/main.html

In brightest day, in blackest night,
no evil shall escape my sight!
Let those who
worship evil's might,
beware my power...
Green Lantern's light!
__________________
SF worldbuilding at
http://www.orionsarm.com/main.html

Judging from what you all said:
It maybe possible that the reason green is always absent is because its wavelength is located in the middle of the color spectrum wavelength....
(hope you catch it...)

I think that it's yellow that is in the middle.

Maybe I should just change the color of three flashlights, one red, one green, and one yellow and combine there light to see what color it makes... But I am on vacation in Spain now, so that will have to wait until I get back.

Interesting to know that you choose primary 'photo' color diferent than what I choose: red green blue
Oh, and don't mix it with the red yellow blue (or in technology language: cyan magenta yellow) cuz the latter are pallete primary colors