Matrix Formatting Ideas

Hi,
I think you can achieve something very similar to what you are looking for,
like this

first, you need to create 2 measures for that:
1) back color - for the background rows you want to highlight 

2) font color - for highlighting the text with the dark background 

see examples

back_color =
VAR selctedVal = SELECTEDVALUE('Dim Date'[MonthYearInt])
RETURN
IF(selctedVal IN {202203,202205,202212}, "GRAY","WHITE")

font_color =
VAR selctedVal = SELECTEDVALUE('Dim Date'[MonthYearInt])
RETURN
IF(selctedVal IN {202203,202205,202212}, "WHITE","BLACK")

second,
you need to define for each column (measure) the condition on "Cell elements"

good luck