Conditional formatting for "rows" in matrix visual?

If I understood this correctly, I got around it by creating a computed column -- let's call it "ColorPicker".

In my instance, my Matrix has 3 rows of data (and multiple columns), the rows and their respective headers are:

StatusA (row 1)

StatusB (row 2)

StatusC (row 3)

My colorpicker computed column (which is a Nested IF) basically indicates that in my source data:

IF I come across StatusA, assign colorpicker a value of 1

IF I come across StatusB, assign colorpicker a value of 2

IF I come across StatusC, assign colorpicker a value of 3

Afterward, I apply conditional formatting to the Values within the matrix via:

Format by Rules

Based on field (Min of ColorPicker)

Setup 3 rules:

If value is 1 (number) then Green

If value is 2 (number) then White

If value is 3 (number) then Yellow

Now each respective row of the Matrix has its own color.