JSFiddle - React, Tailwind, and code Playground

JavaScript

var defaults = {
 backgroundcolor: '#000',
 color: '#fff',
 weekdays: ['sun','mon','tue','wed','thu','fri','sat'],
 colors: 
 	{
    red: "#f00",      
    blue: "#00f",
    green: "#0f0"
	}
};

alert(defaults.colors.red);
alert(defaults.colors[Object.keys(defaults.colors)[0]]);