JSFiddle - React, Tailwind, and code Playground

HTML

<ul class="social-icons">
    <li><a href="#"><i class="facebook-icon">asdf</i></a></li>
    <li><a href="#"><i class="twitter-icon">asdf</i></a></li>
    <li><a href="#"><i class="googleplus-icon">asdf</i></a></li>
</ul>

CSS

.social-icons {
    display:inline-block;
    color:#FFF;
 }

.facebook-icon {
    background-color: #3b5998;
 }

.twitter-icon {
    background-color: #00aced;
 }

.googleplus-icon {
    background-color: #dd4b39;
 }

JavaScript

function LightenDarkenColor(col, amt) {
  
    var usePound = false;
  
    if (col[0] == "#") {
        col = col.slice(1);
        usePound = true;
    }
 
    var num = parseInt(col,16);
 
    var r = (num >> 16) + amt;
 
    if (r > 255) r = 255;
    else if  (r < 0) r = 0;
 
    var b = ((num >> 8) & 0x00FF) + amt;
 
    if (b > 255) b = 255;
    else if  (b < 0) b = 0;
 
    var g = (num & 0x0000FF) + amt;
 
    if (g > 255) g = 255;
    else if (g < 0) g = 0;
 
    return (usePound?"#":"") + (g | (b << 8) | (r << 16)).toString(16);
  
}

var hexDigits = new Array
        ("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"); 
function hex(x) {
  return isNaN(x) ? "00" : hexDigits[(x - x % 16) / 16] + hexDigits[x % 16];
 }
//Function to convert rgb color to hex format
function rgb2hex(rgb) {
 rgb = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
 return "#" + hex(rgb[1]) + hex(rgb[2]) + hex(rgb[3]);
}

$( ".social-icons li a i" ).hover(  
      function() {   
        //OnHover 
        $( this ).css("background-color", LightenDarkenColor(rgb2hex($( this ).css("background-color")), 20)); 
      }, function() {    
        //AfterHover
        $( this ).css("background-color", LightenDarkenColor(rgb2hex($( this ).css("background-color")), -20)); 
      });