(at least when I was in the business - and I don't believe it has changed) defined the colors of propaganda in terms of source. White acknowledged the source; gray simply did not acknowledge it; black attributed it to a source other than the true one. US military Psyop doctrine never knowingly produced false information. Deception ops were not Psyop but were intel ops. That is not to say that Psyop resources could not be used but they were not run by Psyop organizations.

My favorite example of a black propaganda op is one I was told about that took Soviet anti-Islam propaganda designed for use in Soviet Central Asia and reproduced it verbatim for use in independent Muslim countries attributing it to the Soviet Embassy or local communist parties or both.

Cheers

JohnT