How can I change Zenity dialog icon?

I want to change the default icon of any dialog in zenity , I write this line of code for ERROR Dialog zenity --error --text='Icon As It Is' --window-icon=/home/ --icon-name=64.png --no-wrap From above Line I succeed To remove default icon, But I want To Change the default icon with 64.png (64.png is 64*64 screen resolution image). The default icon in the dialog box for error is ' -(Minus) sign in red colour' ,for info ' small i in blue color '. It's this icon I want to change. I am using Linux mint 19.