change radio button active color code example

Example 1: change radio button color

input[type='radio'] {
  -webkit-appearance:none;
  width:20px;
  height:20px;
  border:1px solid darkgray;
  border-radius:50%;
  outline:none;
  box-shadow:0 0 5px 0px gray inset;
}

input[type='radio']:hover {
  box-shadow:0 0 5px 0px orange inset;
}

input[type='radio']:before {
  content:'';
  display:block;
  width:60%;
  height:60%;
  margin: 20% auto;    
  border-radius:50%;    
}
input[type='radio']:checked:before {
  background:green;
}

Example 2: change div background color when radio button selected

div.entry {
    position: relative;
    padding: 8px;
    width: 50%;
}
div.entry div.highlight {
    background-color: #fff;
    position: absolute;
    z-index: -1;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
}
div.entry input:checked ~ div.highlight {
    background-color: orange;
}

<div class="entry">
    <input type="radio" name="list" />This is one option
    <div class="highlight"></div>
</div>
<div class="entry">
    <input type="radio" name="list" />This is another option
    <div class="highlight"></div>
</div>
<div class="entry">
    <input type="radio" name="list" />This is a third option
    <div class="highlight"></div>
</div>