YOU SAID:
Black people are very black
INTO JAPANESE
黒人はとても黒人です
BACK INTO ENGLISH
Blacks are very black
INTO JAPANESE
黒は非常に黒です
BACK INTO ENGLISH
Black is very black
INTO JAPANESE
黒は非常に黒です
BACK INTO ENGLISH
Black is very black
That didn't even make that much sense in English.