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 Allies' bombing of Cologne, Germany, and the five hundred souls he gathered up. The sky is yellow, and children try to find the empty fuel tanks from the planes. Death is weary from working, but he knows there is much more to come.
Death interrupts with his experience of the mass deaths of the war. The color of the sky and the children making a game show the small moments of beauty that stand against a huge amount of suffering.