Can anyone explain to me the proper use of color coding on the canvas?  Its very confusing to know when to separate out a new color unless you think your delivery side of things changes with that new color. Otherwise I would assume I could just use yellow for everything if the left side of the model (the delivery side) can serve those same people on the right side.

Is color coding just used for making sure you capture the different structures to deliver to different customers? 

I would assume the color YELLOW could be used to define 3 different customer groups on the right side of the model (THE WHO) as long as it continues to match (THE WHAT) in the middle and also (the HOW on the left).

If one has different propositions that serve different customers and it requires different schema to deliver than I would assume you would want to start using different colors  to represent that schema inside the model to account for any structural costs or changes one must adjust to activities wise or resource wise to deliver all those different things inside one model. 

Other wise I would think one would make separate canvases for each product but at some point if you have 5 products inside a company you would want to link those models up to the main one to account for how they all impact the overall resources of the company so that the delivery infrastructure was aligned to what they company wanted to sell or business lines it was involved in. 

I guess that would all depend on the business architecture/corporate structure when modeling that out.

the example of the bank in the BMG book is kind of what I'm referring to when it comes to evaluating ones resources against ones value prop and then finally aligning it to the target customer to make sure the trade-offs to serve a customer are not too costly and the resources are not too expensive as well.

any ideas how color coding can be used or how to use multiple canvases to explain the architecture of a company?