Customise the colours in Team Foundation Server 2013 Agile Planning Tools
If you want to customise the colours in Team Foundation Server 2013 Agile Planning Tools you need to download and edit the Process Configuration file that tells TFS how to configure many of the features in the Web Access.
Issue [ TFS 2013 Preview ] TF400654: Unable to configure Planning Tools

If you have the ‘team field’ enabled you will receive a “TF400654: Unable to configure Planning Tools” when you try to use the automatic configuration.