Background color not applying those area where no html

[vickygoelk]

Using below logic

html, body{
background-color: #1f1463;
font-family: 'Nunito Sans', sans-serif;
color: #fff;
padding: 0px;
margin: 0px;
-webkit-print-color-adjust: exact;
}

Using following options config

var options = { format: 'Letter',
"orientation" : "portrait",
"header": {
"height": "30mm"
},
"footer": {
"border": 0,
"height": "10mm"
}};