fluentforms-custom-select/style.css

@import url('https://cdn.jsdelivr.net/npm/choices.js/public/assets/styles/choices.min.css');

.option_blue{
        border-left: solid;
        border-color: blue;
}

.option_green{
border-left: solid;
border-color: green;
}

.option_red{
border-left: solid;
border-color: red;
}