Check out example codes for "remove css jquery". It will help you in understanding the concepts better.

Code Example 1

$("#id").css({ 'background-color' : '', 'opacity' : '' });
$(".class").css({ 'background-color' : '', 'opacity' : '' });
//You can remove css by the above.

Code Example 2

$("#id .class").css({ 'background-color' : '' });

// As mentioned in the jquery documentation:
	// Setting the value of a style property to an empty string 
		//e.g. $('#mydiv').css('color', '') 
	// removes that property from an element if it has already been directly applied

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