css font border no fill code example

Example 1: css border botttom

div {
  border-bottom: 4px dashed blue;
  background-color: gold;
  height: 100px;
  width: 100px;
  font-weight: bold;
  text-align: center;
}

Example 2: javascript for border color

var getColor = prompt("Choose your color ", "Enter the  color ");
 var color;
 var el = document.getElementById("color");
 el.innerHTML = "Whatever paragraph message.";
 if (getColor =="Yellow" || getColor =="yellow" || getColor =="YELLOW"){
     color = "#FFFF66";
     el.style.borderColor = color;
 }