First of all your handquilting is beautiful. You have done a great job on it and there is a light at the end of the tunnel.
I think it looks fine as is but still not very noticable. If you want the quilting in the border to stand out you may have to go to a very dark navy or black. You could match whatever color is in the dark patches of the quilt.
That said, I am loath to unpick handquilting, especially when there is nothing wrong with it. If it were mine I would just keep going unless it really, really bugged me that the quilting was not very visable.