odoo18/addons/payment/static/src/scss/payment_provider.scss

.o_form_view {
    .o_payment_provider_desc {
        margin-top: 10px;
        ul {
            list-style-type: none;
            padding: 0;

            i.fa {
                margin-right: 5px;

                &.fa-check {
                    color: green;
                }
            }
        }
    }
    .o_warning_text {
        color: #f0ad4e;
    }
}