How can i change the "Send" button with css?

There are many different kinds of the "Send" button. How can i change it in css?

Thank you! 

With this code you can change all the buttons which value is "Send". I believe all them have the input.button2 class but I'm not sure, I just tested with a few, otherwise you will have to get its class case by case.

Code:

/* Change Send Button */
input.button2[value*="Send"] {
  background-color: #ff0000;
}

/* Change Send Button (Hover) */
input.button2[value*="Send"]:hover {
  background-color: #cc0000;
}

You can do the same with other buttons/language changing where I wrote "Send" in the code by its current value, for example in your case "Aποστολή".