Carlos Villela has just sent me a link to a post by Nick Drew where he uses colors to identify what I’ve called Domain Layers.

Well, one of my thought experiments runs like this: I’m going to give the code a colour. The colours I can choose from go like this:

* Yellow - only a specific business customer needs this code
* Pink - only a particular market (e.g. group of customers) would use this code
* Black & White - this bit of code is valuable to a whole bunch of markets
* Blue - this code is a piece of infrastructure that I cannot change.

Nick’s post focus on the cost of development and economics of each “color”. Very nice article.