COLOR BOX FOR LEGEND THAT SHOW %

Please provide sanitized sample data that fully covers your issue.
https://community.powerbi.com/t5/Community-Blog/How-to-provide-sample-data-in-the-Power-BI-Forum/ba-p/963216
Please show the expected outcome based on the sample data you provided.

https://community.powerbi.com/t5/Desktop/How-to-Get-Your-Question-Answered-Quickly/m-p/1447523

Hi Anonymous ,

Accoridng to your statement, I suggest you to try conditonal formatting.

For reference: Apply conditional table formatting in Power BI - Power BI | Microsoft Learn

Here I create a sample to have a test.

Measure:

Percentage = 
VAR _Value =
    CALCULATE ( SUM ( 'Table'[Value] ) )
VAR _Total =
    CALCULATE ( SUM ( 'Table'[Value] ), ALL ( 'Table' ) )
RETURN
    DIVIDE ( _Value, _Total )

Color = 
VAR _RANK = RANKX(ALL('Table'),[Percentage],,DESC,Dense)
RETURN
SWITCH(_RANK,1,"Green",2,"Yellow","Red")

Format your visual > Cell elements > Series [Percentage]>Background

Result is as below.

Best Regards,
Rico Zhou

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