How can we get the background color of a dialog or menu

Hi,

When we change the theme of a phone, dialog's or menu's background color gets
changed accordingly as per theme.

I want to get that default color.

I have tried GetColor() , iEikonEnv->Color(EColorDialogBackground) functions
but nothing is working and I am unable to find such function that return the default
background color.

Please help me out.

Thanks in advance

Rishi Garg