Formatting top 3 largest bars in bar chart?

[Black_magic100]

I have a very simple bar chart that uses a calendar date table for the x axis and a count of a primary key for the y axis.  I would like to create a measure that would allow me to color the top 3 largest bars blue and leave everything else grey.  Can anybody help me out?  I know it is possible to select max, but can you write a measure to select top 3 max?

[Zubair_Muhammad]

@Black_magic100

Try a Measure on these lines

Measure =
IF (
    SELECTEDVALUE ( 'Calendar'[Date] )
        IN TOPN ( 3, ALL ( 'Calendar'[Date] ), [Primary Keys], DESC ),
    "#0000FF",
    "#909497"
)

[Black_magic100]

I created a measure to sum my column as a whole, but even then I am not sure how your measure is suppose to work.  A measure can't be a value in a bar chart, it defaults to tooltip?

[Zubair_Muhammad]

@Black_magic100

Please see the attached file

[Black_magic100]

Ahh there is the issue.  You are selecting the top 3 values of the table.  I need the top 3 values (counts) of the visual itself.

The visual might have 3 bars or 31 (it is a month long) and it can be adjusted by month and year.  So If I select February 2017 I would want the top 3 bars to be highlighted

[Black_magic100]

I am confused what primary keys is suppose to be?  It expects a measure, not a column