Conditional formatting levels in a matrix visual based on filters

I have a data set that includes up to 4 levels of parent/child relationships. I've used the information at https://www.daxpatterns.com/hierarchies/ to set up the relationships. Each row also has a boolean field called Important. This can be set at any level in the hierarchy.

I have a matrix visual that displays the data in a hierarchy. I have set up a slicer for the Important field. The matrix visual displays parent rows that that are not flagged as important if it has a child row that is flagged as important. This is the behaviour I want.

Now I'd like to apply conditional formatting to highlight rows that are tagged as important, to distinguish them from rows that aren't tagged as important but have an important child row.

The bullet points below show's the hieararchy filtered to just the important items (including parents). I assume I need to create a measure that will identify if the row is set to important or not.

• Sell House
  • Fix windows
  • Landscape Garden
    • Cut lawn
• Buy house
  • Find new house
    • Shortlist properties

Is this possible?