Yes there is less labor, and there is some strength gained, but this is a double edged sword, such pieces usually fare quite well as purlins, but they are found almost as commonly as joists. When used as groundfloor joists, where they are subjected to the moisture that is perking up out of a dirt floor they oft'times suffer rot problems, sometimes even without a nearby leak, and often not seen in a fully hewn piece right next to it.
A Desibu is a scribe term of French derivation, a detail where the nose of a brace is clipped back so it's shoulder does not have a (somewhat fragile / somewhat dangerous) knife edge.
And they don't have a color in any real sense, this was just a nonsense question floated (and my twisted sense of humor) to see if it might elicit a response - Thanks for asking.
