But #fefefe isn't black or white? I presume the commenter specifically didn't say greyscale. EDIT- checked the source: It looks like imagemagick's 'threshold'

But #fefefe isn't black or white? I presume the commenter specifically didn't say greyscale. EDIT- checked the source: It looks like imagemagick's 'threshold' [0] command is being used, so everything is max/min/black/white: https://github.com/firstlookmedia/pdf-redact-tools/pull/23/commits/e5e110f4f52bae58a5538c8b99f272050e99f506#diff-3bdc5abf0a60ad14fab98eb6df02c7a6R88 https://github.com/firstlookmedia/pdf-redact-tools/pull/23/c... [0] https://www.imagemagick.org/script/command-line-options.php#threshold https://www.imagemagick.org/script/command-line-options.php#...