What color is the sky on Mars?

Typically, we are told that mars has a reddish sky,
but that may prove to simply be a result of how 
the images were adjusted to fit preconceived 
theories on what it was expected to look like. 





Taken from this article:
www.arkcode.com/photo4_12.html

Now of course, the sky is going to be different 
when there is a dust storm blowing. 
So of course what is being questioned
is what color the sky is on a clear day.
The dust certainly will make it go red.

Perhaps the method required is to get an
orange light bulb, and notice that it casts blue shadows
which is fairly standard color inversion theory in graphic art.

If we had a blue sun (try a blue light bulb too)
then the shadows cast will be of the polar opposite 
color - they will be orange.

So because the sun is still orange on a clear day
the sky should be the same shade of blue it is here.

Rayleigh scattering is a theory from the 1800's
which is premised on the wrong idea that the sun
is white, and that it only appears orange.

Modern astronomy has it that the sun is a type 'G' star.
It is orange. So long as the sky is clear it will appear blue.

Here is my impression of the sky on planet that has a blue sun:


Now what is interesting is that in Egypt on very dusty 
days the sun has been photographed to appear blue:



Curiouser and curiouser

What do you think?

What is the REASON behind your answer?