Add the code below to Custom CSS field on your Pricing Table widget’s Appearance tab:
.eapps-pricing-table-column-features-item-icon.eapps-pricing-table-column-features-item-icon-check {
fill: green !important;
}
.eapps-pricing-table-column-features-item-icon.eapps-pricing-table-column-features-item-icon-cross {
fill: red !important;
}