Thank you all for your tips and advise, I am going to give it a try, I feel more confident that it will look OK having read all your posts.
Feline Fanatic love your quilt, thanks for posting it.

Gal

I am using a varigated thread on my current project and it's working very well. It sounds as though your thread will look beautiful on your quilt. Go for it. Can't wait to see the finished product.