The blue colour does not appear correctly in Snow or Sepia themes.

Test pdf: https://wes.copernicus.org/articles/9/2333/2024/

Original:
https://s3.amazonaws.com/zotero.org/images/forums/u265723/0o2otlpepqx0ps7fd2or.png

Snow:
https://s3.amazonaws.com/zotero.org/images/forums/u265723/q9tqfuqhrqfi2p5fbgz3.png

Sepia:
https://s3.amazonaws.com/zotero.org/images/forums/u265723/uuwthqgrhxy13zaplsai.png

If I create a new theme with the same parameters as Original:
https://s3.amazonaws.com/zotero.org/images/forums/u265723/rf2287gvkwl5nz6h32sp.png
It still changes the blue colour:
https://s3.amazonaws.com/zotero.org/images/forums/u265723/3okojd22yy108eu9u33f.png

Sepia in Wondershare PDFelement:
https://s3.amazonaws.com/zotero.org/images/forums/u265723/t8yj4anlq93t696t0hy0.png

Zotero 7.1-beta.10+7256072c5 (64-bit)
Windows 10