JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    Color 1 <select data-bind="options: colors, value: selectedColor"></select>
</div>
<div>
    Other Color <select data-bind="options: colors, value: selectedColor" ></select>
</div>

JavaScript

var vm = {
    colors: ["Red", "Yellow", "Green"],
    selectedColor: ko.observable('Green')
}

ko.applyBindings(vm);