Hello Naredra,
For multiple buttons, to change the current clicked button color use the jquery.
Use the same class for all buttons. I used the class "buttonClass". When you click on the button append the class colorChangeClass.
Use the below jquery. Use your classes.
// CSS
.colorChangeClass{
color: red;
}
$(document).ready(function(){
$(".buttonClass").removeClass("colorChangeClass");
$(".buttonClass").click(function(){
$(".buttonClass").removeClass("colorChangeClass");
$(this).addClass("colorChangeClass");
});
});