How is “in black and white” used?

In Witness for the Prosecution (1957), one line is: “I'm not just saying. I've got it in black and white.”

Which movie is “in black and white” from?

The clip at the top of this page is from Witness for the Prosecution (1957).

I'm not just saying. I've got it in black and white.

8 作品で登場 · 1 本目

(of a film, photograph, or picture) shown only in black, white, and gray, with no other colors; in writing or in print

編集映画の 63%
(of a film, photograph, or picture) shown only in black, white, and gray, with no other colors
オックスフォード映画の 38%
in writing or in print
It is all there in black and white
I'm not just saying. I've got it in black and white.

定義：Oxford Advanced Learner's Dictionary 第 9 版