I produce about 1,000 of these guys a year. I have been working to get the blue color for around 2 years. It started off as just a slight blue. The blue has just recently gotten a lot better. The last two hatches have been fabulous. About 75% blue. Varying from a light blue to a deeper blue. Maybe one more year and I will have the color fixed real nice. I have selected some what I call ice blue to selectively breed as well. These ones are a white blue. Hopefully I can fix these as well. The last 2 batches of my groups had the blueist crays I have gotten so far. The ones you got came from those 2 batches. They seem to change color according to their mood. They also change a little after a molt. I have 6 breeding groups going now. And the bigger they get the color seems to get darker blue. When i first started with this blue I found ones like the brown with blue markings. From this I have been getting a better blue with every hatch. With about a 75% blue coloring with the remaining 25% being a washed out brown. 10% of them are the rarer white blue. I have seperated these and I am starting to work with them as well. Newjohn got one of those. 25% are the blue like in Newjohn's picture and 40% having blue coloration to their body. Varying from cray to cray. I am hoping to have the blue fixed in 1-2 years. So to me it is like a program. Each hatch is better than the last and untill the crays grow up a little you do not know what you have. Bugs, kinks or brown color is what I am working to get rid of.
Well I took Mustafa's advice and used a magnifying glass and got a better picture. With more trying I think I can better myself. Here is a pic of one of my Breeder blue females. She is about an inch and a half.