Purple haze

Thames Estuary by Turner

There was the red sun, on the low level of the shore, in a purple haze, fast deepening into black; and there was the solitary flat marsh; and far away there were the rising grounds, between which and us there seemed to be no life, save here and there in the foreground a melancholy gull.

Charles Dickens (in Great Expectations - as Pip et al aim to make their escape via the Thames estuary by Grain)