YOU SAID:

colours don't live in my head

INTO JAPANESE

色は私の頭に住んでいない

BACK INTO ENGLISH

Color does not live in my head

INTO JAPANESE

色が私の頭にない

BACK INTO ENGLISH

No color in my head

INTO JAPANESE

頭に色がありません

BACK INTO ENGLISH

No color on head

INTO JAPANESE

頭に色がない

BACK INTO ENGLISH

No color on head