src/app/modules/error/common-error.component.scss
:host {
display: flex;
flex-direction: column;
flex-flow: column;
height: 100%;
background: #F9F9F9;
}
.header{
position: relative;
height:calc(100vw / 4 * 3);
width:100%;
max-height: 250px;
min-height:150px;
background:#999999;
mat-icon{
position: absolute;
top:0px;
right:0px;
bottom:0px;
left:0px;
margin:auto;
width:64px;
height: 64px;
font-size: 64px;
}
}