How to Highlight Max Value / Max String with diff color in the Slicer Visual

Hi KR300 ,

As Ibendlin said, there is no way to apply conditional formatting directly to the slicer. You can create a table visual and apply conditional formatting to it to fulfill your needs. The steps are as follows:
1. Create the following measure

Conditional formatting = 
VAR _selid =
    SELECTEDVALUE ( 'Table'[ID] )
VAR _maxid =
    CALCULATE ( MAX ( 'Table'[ID] ), ALL ( 'Table' ) )
RETURN
    IF ( _selid = _maxid, "Green" )

2. Create a table visual and go to the filter panel and set it up as shown below.

3. Apply conditional formatting to the above table visual.

Best Regards

KR300 Please confirm: do you really need a slicer with just one value on it? can it be resolved with another type of visualization object? If so, I suggest to build the Latest Value measure shown below and used in a CARD (and formatting as needed)  

Latest Value = 
	SELECTCOLUMNS(
		FILTER(
			'Table',
			'Table'[ID] = MAX('Table'[ID])
		),
		'Table'[Name]
	)

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly

Kudos are accepted😀