How to remove particular key from a map?

This is pretty simple one, One of my friend asked me how to remove a particular key-value pair from a map.

Below is code snippet for the same. Hope It will help all.

Map<String, String> colorCodes =   new Map<String, String>();

colorCodes.put('Red', 'FF0000');

colorCodes.put('Blue', '0000A0');

colorCodes.put('Blue2', '0000A0');

// If you know the key then just use like below
     colorCodes.remove('Blue2');

System.debug('printing=== '+colorCodes);
//if you are not sure what about the key or need some manipulation then follow below approach

for(String key:colorCodes.keySet().clone()) {

    // myMap.get(key), process that value

    colorCodes.remove('Blue2');

}

System.debug('printing==ater= '+colorCodes);