Different chart color for certain dates

[cyberuser]

Hello, I produce a simple pivot bar chart with date on X and the count of apples sold on Y, based on the data of 2 years.

These are the columns :
YEAR, Month, Day, WeekDay, Apples_Count

My question is, on the chart, how can I automatically highlight (paint in red for example), all bars that show values from fridays ?

Thanks !

[dflak]

Please attach a sample workbook so we can help you better.