The sun seemed to set in yellow this afternoon, filtered by thick
cirrostratus, but some time after sunset there was a pink flush
across the entire sky, lighting up the underside of the Cs and
Ci and revealing extensive fallstreaks and well as some patches
below the main sheet .... became quite reddish-purple as the
light faded.

I can't remember such a contrast between pre-sunset and
post-sunset colours before ... not that I spend much time
looking.

Philip