Okay, so the first picture of the cockerel and pullet are Blue English Orpingtons. (Greedy Guts in the back is a Mauve which means she carries and expresses both the Blue and Chocolate genes). The second photo of the hen is a Lavender (otherwise known as Self Blue which I detest as it causes confusion for people).
These colors are usually easy to tell apart as Lavender is usually a soft, even, pearly-grey color. Each feather is the same color as the next and are uniform throughout. (Poor quality Lavender birds may also exhibit frayed and raggedy feathers. This is a result of the "shredder gene" that often appears in Lavender birds and makes them look like "they've been used to scrub a dirty patio". - Overo Mare
Blue can be much more variable as you can have light, medium, or dark blue. In general, Blue is not even and breeders strive to get scalloped, or laced feathers on their Blue birds.
So in the first picture, where the birds are sitting on some tractor equipment, the cockerel is a Blue English Orpington, as are the two Blue pullets. The two Buff Orpingtons came from a hatchery.