The type of chickens that lay blue eggs are called Easter Eggers. They are Araucana mixes and can lay blue, green, brown or white or a blend of those colors depending on the genetics. The gene for blue eggs is actually dominant. It is a seperate gene from the ones that control white or brown egg color. So the egg can have both blue and brown color. That can make them look greenish or kakhi.
I was wondering if this hen was ever going to start laying. She finally did start at 7 months and I'm really happy with the color of her eggs. The photo shows it next to a brown egg my Plymouth Barred rock layed for comparison.