openecomp-ui/resources/scss/components/_vspDetailsVendorSelect.scss

.vsp-details-vendor-select {   
    .validation-form-content {
        padding-top: 20px;
        .vendor-selector-modal-title {
            @extend .body-1;
        }
        .vendor-selector-modal-additional-text {
            @extend .body-2;
            margin-top: 10px;
            margin-bottom: 20px;
        }
    }        
}