Change background color and text color of toggle caption

Add this code to the Custom CSS field on the Appearance tab of your Pricing Table widget’s settings:

.eapps-pricing-table-toggle-item-hint {
background: red!important;
color: white;
}
.eapps-pricing-table-toggle-item-hint::before {
border-color: red transparent transparent transparent!important;
opacity: 1;
}