Row by row Conditional Formatting on a Matrix

I refactored the code. Seems to work better now.

color =
SWITCH (
    TRUE (),
    ISINSCOPE ( 'Date Table'[Day Number] ),
        VAR a =
            ADDCOLUMNS (
                CALCULATETABLE (
                    SUMMARIZECOLUMNS ( 'Date Table'[Day Number] ),
                    REMOVEFILTERS ( 'Date Table'[Day Number] )
                ),
                "sd", [sum data]
            )
        RETURN
            DIVIDE ( [sum data] - MINX ( a, [sd] ), MAXX ( a, [sd] ) - MINX ( a, [sd] ) ),
    ISINSCOPE ( 'Date Table'[Month] ),
        VAR a =
            ADDCOLUMNS (
                CALCULATETABLE (
                    SUMMARIZECOLUMNS ( 'Date Table'[Month], 'Date Table'[Month Number] ),
                    REMOVEFILTERS ( 'Date Table'[Month], 'Date Table'[Month Number] )
                ),
                "sd", [sum data]
            )
        RETURN
            DIVIDE ( [sum data] - MINX ( a, [sd] ), MAXX ( a, [sd] ) - MINX ( a, [sd] ) ),
    ISINSCOPE ( 'Date Table'[Year] ),
        VAR a =
            ADDCOLUMNS (
                CALCULATETABLE (
                    SUMMARIZECOLUMNS ( 'Date Table'[Year] ),
                    REMOVEFILTERS ( 'Date Table'[Year] )
                ),
                "sd", [sum data]
            )
        RETURN
            DIVIDE ( [sum data] - MINX ( a, [sd] ), MAXX ( a, [sd] ) - MINX ( a, [sd] ) )
)