anguilar material checkbox chnage color code example
Example: material design checkbox change colooru
// overwrite the checkbox background
::ng-deep .mat-checkbox-checked .mat-checkbox-background,
.mat-checkbox-indeterminate .mat-checkbox-background {
background-color: black !important;
}
// overwrite the ripple overlay on hover and click
::ng-deep .mat-checkbox:not(.mat-checkbox-disabled) .mat-checkbox-ripple .mat-ripple-element {
background-color: black !important;
}