6) Colour assignment guideline.
a) Problem: Users need to give semantic meaning to the
relation between an interface element and a colour.
b) Context of application: The user demands to easily
identify groups or elements in interfaces with much
information.
c) Solution: Organize the information offering the user a
mechanism to choose a colour to represent a set of data through
all interfaces. In function of a criterion specified by the user,
the interface colours a visual element (sphere, bar, area, etc.)
that represents a set of data. This solution deals with Challenge
4.
d) Motivation: Colour selection provides an effective
mechanism for non-intrusive grouping. Colour assignment
pattern helps maintain a colour-logic through all interfaces.