This is natural Lapis Lazuli — but the large amount of white and grey inclusions (mostly calcite) give it the color tone of your denim jeans that have been washed until they are comfortable. Some strands have a bit of pyrite inclusions, too, for sparkle.
Current stock has lots of medium to darker blue tones, as you can see from the new picture. All beads have inclusions - mostly in tan to grey tones. 8mm Denim Lapis Round Beads Gemstone Round beads are sold on 15.5" strands.