Save output with colors to HTML/PDF etc

Install aha.

git show \
    | delta --no-gitconfig --file-decoration-style blue --hunk-header-decoration-style blue \
    | aha \
    > /tmp/diff.html

Now open /tmp/diff.html in a web browser, print to PDF, etc.

Remove the --no-gitconfig above to use your own delta style, but note that aha does not handle hyperlinks or decoration boxes etc.