"I loro giornali sono in bianco e nero."

Translation: Their newspapers are black and white.

[ceceg]

Is it necessary to include the preposition "in"? It seems with describing the colors of other objects we just wrote, for example, "Le camicie sono bianche e nere."

[f.formica]

Yes, if you were describing their color you'd say "i loro giornali sono bianchi e neri", while "in bianco e nero" refers to the way they present their content, black&white vs color.

[tmac876]

Ah, same question. Thank you for your response. This now makes a lot of sense.

[Kedeljer]

Why is it not bianchi e neri?

[ElphieDGood]

the newspapers are not in "blackS and whiteS", they are in "black and white"

[ashlward]

Could you say nero e bianco?

[OzrenIlic]

They should be more tolerant of typos and writing mistakes. I wrote "nero" with double "r" and lost a heart. In German tree such mistakes are always tolerated.

[scraggy0214]

why does the answer have to have a s!!!!!!!!!!!!!!!!!!!!