Treemap Color coding with Tableau

Guideline: Two color coding within the squares.

Data source.DOI:10.25337/T7/ptycho.v2.0/US.38362002 from Project Tycho
Can I add two color codings (different colors) for two different detail items in the leaf node (country and age groups) within the Treemap in the Tableau? If it is possible, how can I achieve this?

You can achieve that by setting one of the dimensions to colour as you already have with “Condition Name” and then adding a discrete measure as another colour field.
Rightclick and use the settings below.