Tableau color palette assignment

Version 1

    I need the color palette to reset by manager, that way, when you look at the a single manager you don't see the same colors.  This has been an issue that I can resolve manually, but is not optimal.  I don't want to use separate palettes and I don't want to use a gradient by manager, just assign a grouping the color assignment that determines the pallet should reset and start assigning from the beginning again.

     

    The attached demonstrates this with a treemap, but I have similar use cases when assigning colors by region/territory on a map.

     

    This is more a enhancement request than a support question, but if someone has worked around this it'd be great.  I'm typically connecting to SSAS, so my options for calculated columns and such are more limited.