Conditional formatting one column based on a value in a matrix visual with multiple columns

Hi  neskowin ,

According to your description, here are my steps you can follow as a solution.

(1)My test data is the same as yours.

(2) We can create two measures. 

measure = SUM('Table'[value])

color = var a=MAXX(FILTER(ALLSELECTED('Table'),[Test]="A"&&[attribute]="Score"&&[Method]="x"),[value])
var b=MAXX(FILTER(ALLSELECTED('Table'),[Test]="A"&&[attribute]="Score"&&[Method]="y"),[value])
return IF(OR(SELECTEDVALUE('Table'[Test])="A",SELECTEDVALUE('Table'[attribute])="Score"),"White",(IF(or(SELECTEDVALUE('Table'[Test])="B"&&SELECTEDVALUE('Table'[Method])="x"&&SUM('Table'[value])>a,SELECTEDVALUE('Table'[Test])="B"&&SELECTEDVALUE('Table'[Method])="y"&&SUM('Table'[value])>b),"green","red")))

(3)Set the conditional formatting as shown in the following figure and then the result is as follows.

Best Regards,

Neeko Tang

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