LitCharts assigns a color and icon to each theme in The Book Thief, which you can use to track the themes throughout the work.
Death
Words and Language
Books
Stealing and Giving
Color, Beauty, and Ugliness
Summary
Analysis
Death describes the sky as "the color of Jews," and he sadly talks about the souls in the concentration camps. Death asks God for answers just like humans do, but he receives no response. He gently carries away the souls of some French Jews in Poland. He describes the sun as "blond" and the sky as "a giant blue eye."
One of the most tragic chapters – all of nature seems transformed by the horrors of the Holocaust. The clouds are colored by the cremated victims, and the sun and sky (blonde and blue-eyed like Hitler's "master race") symbolize how Hitler and his ideas have infected everything.