Personalize button-toggle-group (Material 2)

I solve this problem override the custom directives

mat-button-toggle {
    border: 1px solid #f28628;
    border-radius: 4px;
    margin-left: 3px;
    margin-right:3px;
    width: 30px;
    height: 30px;
    font-family: 'Nunito Semibold', sans-serif;
    font-size: 14px;
    font-style: bold;
}

.mat-button-toggle-disabled {
    border: 1px solid #c5c0c7;
    background-color: #e1dde5;
}

div.center-text {
    margin-left: -8px;
    margin-top: -3px;
}