>meanwhile in real lifeYes, the sky can and does look like that sometimes, and even more extreme. It's most common at twilight after storms. It's not common, but it is possible. Other causes are dust or pollution. Basically anything causing the sunlight to scatter more than usual, filtering out the blue we normally see. Food for thought:
https://www.forbes.com/sites/briankoberlein/2017/01/11/earths-skies-are-violet-we-just-see-them-as-blue/#5a615231735f 