The Bright Analytics Report engine will have a default colour palette which will be assigned to dimensions and metrics at random and will appear in the dashboards (this is editable on individual metric and dimension values).
For more information on editing colours please read the article.
If you would like to tailor your dashboard colour palette to include new colours you can do this by navigating to the 'Colour Palette' section of the report engine.
This is accessible under the 'Client Admin' drop down in the top right of the Report Engine UI.
This page is where you can add, edit or remove colours from the Bright Analytics default colour palette.
This uses Hex colour codes so you will need to know this for the colour of your choice in advance.
You can simply add new colours by clicking the + button or you can edit existing colours by changing the code.
You can then save changes or revert back to the old palette if you decide you don't want to make any changes.