Check out example codes for "background color none". It will help you in understanding the concepts better.

Code Example 1

element {
	background-color: transparent;	
}

Code Example 2

//javascript type css:
document.body.style.backgroundColor = "blue";
// or inline css:
<div style="background-color: blue;"></div>

Code Example 3

/* To apply color to background you have to use 'background-color' property and value of property is color name. */
html,body {
  background-color: blue;
}

Learn ReactJs, React Native from akashmittal.com