Branding with colour
Colour can be used to show the data are part of a particular brand or collection.
Census 2011
For example, the 2011 Census used a purple colour scheme and this was used in the design of their charts.
Example of Census 2011 purple branding in a chart
But….
Do not be constrained to only using your corporate or brand colours. Use the colours that are most appropriate to highlight patterns in the data and can be perceived the most clearly by all users.