multicolor border in css code example

Example 1: vertical multi color border css

.fancy-border {
  width: 150px;
  height: 150px;
  text-align:center;
  border-top: 5px solid;
  border-image:   linear-gradient(to right, grey 25%, yellow 25%, yellow 50%,red 50%, red 75%, teal 75%) 5;
}

Example 2: vertical multi color border css

<div class="test"></div>

Example 3: vertical multi color border css

.test {
  width: 500px;
  height: 100px;
  background-color: #ccc;
  position: relative;
}

.test:before,
.test:after {
  content: "";
  position: absolute;
  left: 0px;
  right: 0px;
  height: 10px;
  background-image: -webkit-linear-gradient(0deg, red 20px, blue 20px, blue 40px, yellow 40px, yellow 60px, green 60px, green 80px);
  background-image: -ms-linear-gradient(0deg, red 20px, blue 20px, blue 40px, yellow 40px, yellow 60px, green 60px, green 80px);
  background-size: 80px;
}

.test:before {
  top: 0px;
}

.test:after {
  bottom: 0px;
}