There is 'Black Wind Chronicles' which can be considered similar. In'red snow novel', there might be certain themes like survival, human nature, and the power of the environment. 'Black Wind Chronicles' also delves into these aspects. The contrast of the red snow in one and the black wind in the other both create a sense of danger and unpredictability in their respective stories.
According to the information provided, I'll recommend a few novels similar to Red in the Sky. You can read the two novels," Crimson Moon Calamity " and " Celestial Empress 'Demon Star." " The Crimson Moon " was a fantasy-modern magic novel with a rich and interesting plot. The main character was a cursed girl who possessed powerful magic. The setting of " Demon Queen's Star " was a different world. The protagonist, Xiao Anshang, was bullied after being abandoned by his mother. Fortunately, Fei Jue from the other world helped him. These two novels have similar elements and plots to Red in the Sky. I hope you will like them.
You might want to check out 'Natsume's Book of Friends'. It has a similar charm and focus on relationships, and the art style could be appealing if you like Snow White with the Red Hair.
One manga that could be similar is 'Akagami no Shirayukihime'. It also features a strong female lead and a fantasy setting.
It's quite similar. The anime of 'Snow White with the Red Hair' largely adheres to the manga, with few noticeable differences.