Many hybridizers have tried to make the elusive all blue daylily over the years. Maybe we will be lucky and see if in our life time. I don't shoot for all blue personally I focus on blue eyes and try to extend the eyes out as far as possible. I also try to keep my blue eyes on white or near white selfs. I'm not a huge fan of a pink or purple flower with a blue eye and when I get them I use them in my watermark program to try and get those nice smoky colored watermarks.