Hi Rajesh,
Use below code -
Column 4 = IF(DATEDIFF(LASTDATE[LIDate].[Date]),LASTDATE( LODate].[Date],DAY)>90,"#ff0000","#ffffff")
Now add conditional formating under Format tab and select background color.
Now select Field value under format by,
![](https://www.edureka.co/community/?qa=blob&qa_blobid=9834788299742490352)
Click ok.
For ex:
![](https://www.edureka.co/community/?qa=blob&qa_blobid=17715248302838638343)
Hope it helps you.