Using Four Different Colour Borders in CSS

Is it possible to create a CSS border with 4 different colors on one side? Currently, I have the following:

#header
{
border-color:#88a9eb;
}

I aim to achieve a border featuring four solid colors split equally at 25% each. Can this be done?

I am looking to create a seamless solid version without any white gaps in between like in the image below.

htmlcssborder

Answer №1

Utilize the border-image property to craft a gradient border with 4 colors. By strategically setting the color-stops (percentage values), you can create sharp transitions between colors instead of a gradual blend, resulting in a distinct block-like effect.

To apply the border on specific sides, adjust the border-image-width and gradient direction accordingly. For instance, top & bottom borders require a left to right gradient, while left & right borders need a top to bottom gradient.

The use of percentage values for size and color stops in gradients ensures responsiveness by adapting to changes in container dimensions automatically.

An issue with using border-image is its current lack of support in certain browsers, notably IE10-, which do not recognize this property.

.bordered-top {
  border-image: linear-gradient(to right, rgb(139, 191, 64) 25%, rgb(230, 27, 33) 25%, rgb(230, 27, 33) 50%, rgb(124, 196, 236) 50%, rgb(124, 196, 236) 75%, rgb(254, 181, 17) 75%);
  border-image-slice: 1;
  border-image-width: 4px 0px 0px 0px;
}
.bordered-bottom {
  border-image: linear-gradient(to right, rgb(139, 191, 64) 25%, rgb(230, 27, 33) 25%, rgb(230, 27, 33) 50%, rgb(124, 196, 236) 50%, rgb(124, 196, 236) 75%, rgb(254, 181, 17) 75%);
  border-image-slice: 1;
  border-image-width: 0px 0px 4px 0px;
}
.bordered-left {
  border-image: linear-gradient(to bottom, rgb(139, 191, 64) 25%, rgb(230, 27, 33) 25%, rgb(230, 27, 33) 50%, rgb(124, 196, 236) 50%, rgb(124, 196, 236) 75%, rgb(254, 181, 17) 75%);
  border-image-slice: 1;
  border-image-width: 0px 0px 0px 4px;
}
.bordered-right {
  border-image: linear-gradient(to bottom, rgb(139, 191, 64) 25%, rgb(230, 27, 33) 25%, rgb(230, 27, 33) 50%, rgb(124, 196, 236) 50%, rgb(124, 196, 236) 75%, rgb(254, 181, 17) 75%);
  border-image-slice: 1;
  border-image-width: 0px 4px 0px 0px;
}
div {
  height: 100px;
  width: 300px;
  padding: 10px;
  background: beige;
  margin: 10px;
}
<!-- library added only for old browser support -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>

<div class='bordered-top'>Border only on top</div>
<div class='bordered-bottom'>Border only on bottom</div>
<div class='bordered-left'>Border only on left</div>
<div class='bordered-right'>Border only on right</div>

To achieve a similar effect in IE10+, consider using gradients for the background-image property instead of border-image, demonstrated in the following snippet.

Unlike border-image, control over the applied border side needs to be managed through background-position rather than border-image-width. The thickness of the border is determined by adjusting the background-size, where x-axis refers to thickness for top & bottom borders, and y-axis for left & right borders.

.bordered-top {
  background-image: linear-gradient(to right, rgb(139, 191, 64) 25%, rgb(230, 27, 33) 25%, rgb(230, 27, 33) 50%, rgb(124, 196, 236) 50%, rgb(124, 196, 236) 75%, rgb(254, 181, 17) 75%);
  background-size: 100% 4px;
  background-repeat: no-repeat;
  background-position: 0% 0%;
}
.bordered-bottom {
  background-image: linear-gradient(to right, rgb(139, 191, 64) 25%, rgb(230, 27, 33) 25%, rgb(230, 27, 33) 50%, rgb(124, 196, 236) 50%, rgb(124, 196, 236) 75%, rgb(254, 181, 17) 75%);
  background-size: 100% 4px;
  background-repeat: no-repeat;
  background-position: 0% 100%;
}
.bordered-left {
  background-image: linear-gradient(to bottom, rgb(139, 191, 64) 25%, rgb(230, 27, 33) 25%, rgb(230, 27, 33) 50%, rgb(124, 196, 236) 50%, rgb(124, 196, 236) 75%, rgb(254, 181, 17) 75%);
  background-size: 4px 100%;
  background-repeat: no-repeat;
  background-position: 0% 0%;
}
.bordered-right {
  background-image: linear-gradient(to bottom, rgb(139, 191, 64) 25%, rgb(230, 27, 33) 25%, rgb(230, 27, 33) 50%, rgb(124, 196, 236) 50%, rgb(124, 196, 236) 75%, rgb(254, 181, 17) 75%);
  background-size: 4px 100%;
  background-repeat: no-repeat;
  background-position: 100% 0%;
}
div {
  height: 100px;
  width: 300px;
  padding: 10px;
  background: beige;
  margin: 10px;
}
<!-- library added only for old browser support -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>

<div class='bordered-top'>Border only on top</div>
<div class='bordered-bottom'>Border only on bottom</div>
<div class='bordered-left'>Border only on left</div>
<div class='bordered-right'>Border only on right</div>

Answer №2

To achieve this effect, utilize the CSS properties `box-shadow` and the `after` pseudo-element.

My approach involved creating an `:after` element at the bottom and applying horizontal `box-shadow`s with various colors.

If you wish to adjust the intensity of the border, simply increase the height of the `:after` element.

div {
  width: 200px;
  height: 100px;
  position: relative;
  background: grey;
}
div:after {
  bottom: 0;
  position: absolute;
  content: "";
  width: 50px;
  height: 5px;
  background: green;
  box-shadow: 50px 0 0 0 red, 100px 0 0 0 orange, 150px 0 0 0 green;
}
<div></div>

Applying the same technique to a larger `div` would yield a result like this:

div {
  width: 500px;
  height: 100px;
  background: orange;
  position: relative;
}
div:after {
  bottom: 0;
  position: absolute;
  content: "";
  width: 100px;
  height: 5px;
  background: green;
  box-shadow: 100px 0 0 0 darkred, 200px 0 0 0 red, 300px 0 0 0 yellow, 400px 0 0 0 tomato;
}
<div></div>

Answer №3

After taking inspiration from Harry's original idea, I made some modifications to customize it for my own requirements. Here is the updated code:

  border-image: linear-gradient(to right, #8CC63F 0%, #006F3B 25%, #ED1C24 25%, #9B1B1E 50%, #85CDEC 50%, #217EC2 75%, #FFC20E 75%, #F04E23 100%);
  border-image-slice: 3;
  border-image-width: 0px 0px 4px 0px;
  border-image-repeat: round;

This revised solution perfectly suits my current needs.

Answer №4

Here are some creative solutions for adding borders:

You can create a unique and intricate border using SVG by adding paths with different stroke-dasharray and stroke-color attributes.

For a simpler approach, consider using the border-image property.

If you just need a basic border, you can easily achieve it by creating an image to use as the background, repeating it on one axis, and positioning it at the edge of the container. For example, for a bottom border:

.container {
    background-image: url(image.png);
    background-repeat: repeat-x;
    background-position: bottom left;
}

Answer №5

Here is a suggestion for you to experiment with:

.solid{
  width: 300px;
  border-image: linear-gradient(to right, red 25%, blue 25%, blue 50%, green 50%, green 75%, orange 75%);
  border-image-slice: 4;
}

Check out the DEMO here

Answer №6

Using a linear-gradient is the best solution for this challenge. However, beginners may find this alternative solution helpful. By incorporating 2, 3, or even 4 colors, one can create borders in different ways. While it may not be the most optimal solution, it can aid readers in understanding how colors and borders interact.

<html>
<head>
<style>
p.one {
    border-style: solid;
    border-color: #0000ff;
}

p.two {
    border-style: solid;
    border-color: #ff0000 #0000ff;
}

p.three {
    border-style: solid;
    border-color: #ff0000 #00ff00 #0000ff;
}

p.four {
    border-style: solid;
    border-color: #ff0000 #00ff00 #0000ff rgb(250,0,255);
}
</style>
</head>
<body>

<p class="one">One-colored border!</p>
<p class="two">Two-colored border!</p>
<p class="three">Three-colored border!</p>
<p class="four">Four-colored border!</p>

</body>
</html>

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