A terrific tutorial on color / colour use in infographics from Darrell Wilkinson Geo-computing blog.
The most fundamental employment of colour in [qualitatively/quantitatively] informative graphics is to allow the observer to easily distinguish elements of the information displayed. The strict definition of the term “colour” must be cast aside here, as just as useful are black, greys and white. Much of what will be discussed in this post may seem intuitive, but it is the guidelines and their employment in practice which unfortunately escapes the many.
The most important point to take away from this post is: colour used well can enhance and clarify visual information; and colour used badly will likely obscure and confuse.
2.0 Principals of Colour in design
Colour designers use three variables to describe any particular colour:
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