YOU SAID:

if you add even a small amount of any other color to black...

INTO JAPANESE

黒に他の色を少しでも加えると...

BACK INTO ENGLISH

If you add any other color to black ...

INTO JAPANESE

黒に他の色を追加した場合...

BACK INTO ENGLISH

If you add another color to black ...

INTO JAPANESE

黒に別の色を追加すると...

BACK INTO ENGLISH

If you add another color to black ...