change background color of the first page in Service Desk Plus

change background color of the first page in Service Desk Plus

Hi
I want to change background color of the first page.By default it's white but I want to change it .

I customize the login page in  C:\ManageEngine\ServiceDesk\applications\extracted\AdventNetServiceDesk.eear\AdventNetServiceDeskWC.ear\index.html

but

I can't change the
background color ,  Is there anyone help me?





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