I hate that the sky doesn't have a real colour, ? the molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight. <.> I mean, why can't the sky actually be a colour? The molecules do all the work to make the sky pretty!
? The sky is blue...read this book called Do Bugs Have Bottoms? It was either what you just said or something contradicting it...I can't remember
It appears blue but something makes it blue, just like Mars appears red. But around sunset and sunrise Mars's sky is pinkish-red in color, but in the vicinity of the setting sun or rising sun it is blue. This is the exact opposite of the situation on Earth. However, during the day the sky is a yellow-brown "butterscotch" color. The sky is not blue as on Earth because Martian air is extremely thin, and the dust particles in the air are large relative to the wavelength of visible light. The dust particles preferentially absorb blue light and effectively act as mirrors by scattering the remaining wavelengths: this produces the butterscotch color of the atmosphere. Yes Earth's sky is blue, but there is a reason why... just like on mars, there's a reason why.