Welcome to TB! Your budgies are cute! On the photo Echo's cere looks purplish to me so I guess he is a boy! Unfortunately the quality of the photo isn't very good so it's difficult to guess.
Thank you Gaby, we don't mind if he/she is a male or female. I am just so glad they are getting along so well.
I have never had such rewarding pets - they are definitely part of the family and bring a smile to my face every time I see them.