Britain and pretty much all of Europe during the first half of the 20th Century were burning coal (yes, even in the summer). Add the fact that this was an especially dry summer/fall and you have lots of particles (dust, sand, coal) in the air. When you have a high particle density in the air during a sunrise or sunset you get a reddish/pinkish colour. People in smoggy areas will confirm this.

Now CloD doesn't have dynamic weather, so they cannot have multiple sunset variations depending on season and particle counts for that day/week, so all the sunrises and sunsets are going to look similar.

From what I can see, the pink is accurate.