(idiomatic) Explicitly, in writing, clearly and without doubt or misunderstanding, without any grey areas.
I'll believe that when I see it in black and white.
(literally) Using shades of gray rather than color.
This film was shot in black and white.
Having it displayed using shades of grey/gray rather than colour/color (as it was shot or recorded).
to watch color films in black and white
Even drawing gray hair at all is difficult to render in black and white. Alison Bechdel
Laws assure animals of protection – formally, officially, set down in black and white. But in the long run, the best protection is the human heart. Lloyd Alexander
Which is probably the reason why I work exclusively in black and white... to highlight that contrast. Leonard Nimoy
I don't see the world completely in black and white. Sometimes I do. Benicio Del Toro
I read that prior to the advent of color TV, most people dreamed in black and white. Damian Loeb
Most kids are smarter than most grown-ups. Kids see the world in black and white... They look through all the garbage and see a world run by fools and dullards and lazy people. And there's nothing they can do about it because they have no power. Dav Pilkey