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In the metamodel pictures within this standard, shades of grey are used to distinguish elements belonging to the different aspects of the ArchiMate framework, as follows:

• White for abstract (i.e., non-instantiable) concepts

• Light grey for passive structures

• Medium grey for behavior

• Dark grey for active structures

In ArchiMate models, there are no formal semantics assigned to colors and the use of color is left to the modeler. However, they can be used freely to stress certain aspects in models. For instance, in many of the example models presented in this standard, colors are used to distinguish between the layers of the ArchiMate Core Framework, as follows:

• Yellow for the Business Layer

• Blue for the Application Layer

• Green for the Technology Layer

They can also be used for visual emphasis. A recommended text providing guidelines is Chapter 6 of [1].

In addition to the colors, other notational cues can be used to distinguish between the layers of the framework. A letter M, S, B, A, T, P, or I in the top-left corner of an element can be used to denote a Motivation, Strategy, Business, Application, Technology, Physical, or Implementation & Migration element, respectively. An example of this notation is depicted in Example 34.

The standard notation also uses a convention with the shape of the corners of its symbols for different element types, as follows:

• Square corners are used to denote structure elements

• Round corners are used to denote behavior elements

• Diagonal corners are used to denote motivation elements

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¹ Note that this was called “used by” in previous versions of the standard. For the sake of clarity, this name has been changed to “serving”.