YOU SAID:
My car is a deep dark black
INTO JAPANESE
私の車は深いダークブラックです
BACK INTO ENGLISH
my car is deep dark black
INTO JAPANESE
私の車は真っ黒です
BACK INTO ENGLISH
my car is black
INTO JAPANESE
私の車は黒いです
BACK INTO ENGLISH
my car is black
That didn't even make that much sense in English.