cyberchef/src/web/stylesheets/operations/diff.css

The Cyber Swiss Army Knife for encryption, encoding, compression and data analysis.

del {
    background-color: var(--hl3);
}

ins {
    text-decoration: underline; /* shouldn't be needed, but Chromium doesn't copy to clipboard without it */
    background-color: var(--hl5);
}