YOU SAID:

My blood hasn't been this blue in a long, long time.

INTO JAPANESE

私の血がこんなに青いのは久しぶりだ。

BACK INTO ENGLISH

It's been a long time since my blood has been this blue.

INTO JAPANESE

こんなに血が青いのは久しぶりだ。

BACK INTO ENGLISH

It's been a long time since my blood was this blue.

INTO JAPANESE

こんなに血が青かったのは久しぶりだ。

BACK INTO ENGLISH

It's been a long time since my blood was this blue.