Qliksense Vizlib Pivot table Dimension Color

[Prabhu1204]

Hi 

I am using Qlisksense Viz Lib pivot table. I am using below calculation for Background color. The color is working only when I select the value. Any idea why this happens? 

=if(Plan='P1','red',
if(Plan='P2','Orange',
if(Plan='P3','Green')))