colorCodeTag.html

<script>
  function colorCodeTags(){
    var cells = document.getElementsByTagName("td");// finding all the TD tags
    
    for (var cell of cells) {
      if (!cell.classList.contains("ms-vb-title")) {
        const innerText = cell.innerText

        switch (cell.innerText) {
          case "Blue":
            cell.innerHTML = "<style>img {height: 20px; width: 20px; display: block; margin-left: auto; margin-right: auto; }</style><img src = 'https://collaboration.merck.com/sites/ngppm-uat/Style%20Library/Images/blue.png'/>";
            break;
          case "Green":
            cell.innerHTML = "<style>img {height: 20px; width: 20px; display: block; margin-left: auto; margin-right: auto; }</style><img src = 'https://collaboration.merck.com/sites/ngppm-uat/Style%20Library/Images/Green.png'/>";
            break;
          case "Yellow":
            cell.innerHTML = "<style>img {height: 20px; width: 20px; display: block; margin-left: auto; margin-right: auto; }</style><img src = 'https://collaboration.merck.com/sites/ngppm-uat/Style%20Library/Images/Yellow.png'/>";
            break;
          case "Red":
            cell.innerHTML = "<style>img {height: 20px; width: 20px; display: block; margin-left: auto; margin-right: auto; }</style><img src = 'https://collaboration.merck.com/sites/ngppm-uat/Style%20Library/Images/Red.png'/>";
            break;
        }
      }
    }
  }
  
  setInterval(colorCodeTags, 100);
</script>