I have multiple buttons and I have a class called bg. In the CSS file, I style the bg class, but at the same time, I want to be able to dynamically change its color from the JS file. The background is only one color, but I can make different colors I want, for example, the color codes come from the API (red for test1, yellow for test2, etc.). I want to use whatever code comes up. For example, if you go to the test2 page, the background will be yellow. I could do it by creating classes test1 and test2 in the css file but it doesn't work as there could be hundreds of pages and it would be more logical to use the color codes from the API than the hassle of adding them to the css file .

$('.bg').click(function(){
    $(this).unbind('mouseenter mouseleave');
  $('.bg').removeClass('active');
  $('.bg.active').css('background','yellow');
  $(this).addClass('active');
}).hover(
  function(){
    $(this).css({
      'border-color': '#4000a1',
      'background': 'blue'
    });
  },
  function(){
    $(this).css({
        'border-color': '#4000a1',
        'background': 'transparent'
      });
});

.bg{
  border: 2px solid #4000a1;
  background: gray;
  width: 200px;
  height: 150px;
  margin-bottom: 20px;
}

.bg.active{
  background: red;
}

.bg:hover{
  background: red;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class='bg'></div>
<div class='bg'></div>

I tried something similar but it seems the hover works fine but when clicked it stays fixed but I only want one of them to stay active. Also, in my original file, addClass and removeClass are done in another file, and correctly there is only one active class, but the style does not change.

I hope I explained my problem correctly.