YOU SAID:

My favorite color is blue but only the dark one.

INTO JAPANESE

私の好きな色は青ですが、暗い色だけです。

BACK INTO ENGLISH

My favorite color is blue, but only dark.

INTO JAPANESE

私の好きな色は青ですが、暗いだけです。

BACK INTO ENGLISH

My favorite color is blue, but it's only dark.

INTO JAPANESE

私の好きな色は青ですが、暗いだけです。

BACK INTO ENGLISH

My favorite color is blue, but it's only dark.