The band was pretty, though, and so were the brilliant green "lakes" between the clouds at sunset. I haven't seen that for quite a while.
The other thing that might be lost is magenta-- *bright* pinkish purple that would show up late in some sunsets, and which I've also seen in Frazetta paintings, though I can't remember which ones offhand.
Has the sky changed in your lifetime?
If you saw a picture of a sunset with bright green in the sky, would you think someone was making it up?
How about other implausible skies? I remember a sunset with puffy, evenly pink clouds that went as high as I could look without tipping my head up. I certainly wouldn't have believed it in a picture.
Some of Gauguin's paintings have yellow "shadows" under the trees, and I'm told critics thought he was using arbitrary color for composition until someone realized it was fallen flower petals.