Exodus 28:37

Fasten a blue cord to it to attach it to the turban; it is to be on the front of the turban.

(New International Version)

'You shall fasten it on a blue cord, and it shall be on the turban; it shall be at the front of the turban.

(New American Standard Bible)

And thou shalt put it on a blue lace, that it may be upon the mitre; upon the forefront of the mitre it shall be.

(King James Version)