No Banded Row color in Outermost row header - Tabular Matrix

 I figured it out.  I needed to check "repeat row headers" to have the banding show in the outer row field when multiple row fields are used.  Thanks

Hi lauriedata 

You can create an aux table for column labeling, as shown in the following figure:

Then manually set the column width of the two columns of the row label to the minimum, thereby achieving visual hiding, as following figure:

The measure as below:

Measure = 
VAR CurRow_Category = MAX('Fact'[Category])
VAR CurRow_Product = MAX('Fact'[Product Name])
VAR CurCol_Type = MAX('AuxTable'[Type])
VAR CurCol_Item = MAX('AuxTable'[ColumnItem])
RETURN
SWITCH(
    TRUE(),
    CurCol_Type<>"Label",
        CALCULATE(SUM('Fact'[Sales]),TREATAS(VALUES('AuxTable'[ColumnItem]),'Fact'[Month])),
    CurCol_Type="Label",
        SWITCH(CurCol_Item,"Category",CurRow_Category,"Product Name",CurRow_Product)
)

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Thank you~