They replaced the old design? I liked that more. But I didn't know they had ones which are not yellow. Do you know what the different colors mean?

yellow: classic works of the German language and other languages translated into German

red: classics in their original foreign language

orange: bi-lingual books

blue: study guides

green: original historical sources with explanations

magenta: non-fiction (politics, history, society, natural sciences, art, music or religion)

source: https://en.wikipedia.org/wiki/Reclam