How to Black Text on 4Chan | Comprehensive Guide to Spoiler on 4chan.
How to Black Text on 4Chan: It is considered polite to avoid giving away key plot points when discussing films, video games, and books on the internet. Those key plot points are called spoilers— so-called because they spoil the suspense for users who haven’t seen the movie, game, or book yet.
You can use “spoiler” tags to keep plot points secret on 4Chan message boards, which create a black background behind the words and phrases. The black background effect combined with black text renders the “spoilers” unreadable unless you place or highlight your cursor above the document.