Read many years ago (Sixties-Early Seventies) but could have been a reprint from earlier. Science fiction type story. Don’t remember which comic but every publisher had at least one SF type title.
OK, here’s the plot. Aliens send advance scouts to Earth posing as humans as a possible invasion target. They know what humans look like because they’ve intercepted our TV broadcasts. The scouts are detected immediately because the aliens didn’t know that actual humans are “in color” rather than “black and white”.
I’ve looked through more on-line comics looking for this thing and have read more stories about monsters with names seemingly selected by tossing random scrabble tiles into the air than I’d care to admit, so I’m tossing it out to the experts here in hopes that somebody will recognize it and be able to point me in the right direction.