Redefining the colors of an SVG when it is a CSS background image in code

I currently have an SVG icon encoded within my CSS file. I'm looking to change the color of this icon when a user hovers over it without creating a duplicate icon in a different color.

Here's a snippet from my CSS file:

background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 511.999 511.999'%3E%3Cpath fill='red' d='M83.578 167.256H16.716C7.524 167.256 0 174.742 0 183.971v300.881c0 9.225 7.491 16.713 16.716 16.713h66.862c9.225 0 16.716-7.489 16.716-16.713V183.971c0-9.229-7.525-16.715-16.716-16.715zM470.266 167.256c-2.692-.456-128.739 0-128.739 0l17.606-48.032c12.148-33.174 4.283-83.827-29.424-101.835-10.975-5.864-26.309-8.809-38.672-5.697-7.09 1.784-13.321 6.478-17.035 12.767-4.271 7.233-3.83 15.676-5.351 23.696-3.857 20.342-13.469 39.683-28.354 54.2-25.952 25.311-106.571 98.331-106.571 98.331v267.45h278.593c37.592.022 62.228-41.958 43.687-74.749 22.101-14.155 29.66-43.97 16.716-66.862 22.102-14.155 29.66-43.97 16.716-66.862 38.134-24.423 25.385-84.871-19.172-92.407z'/%3E%3C/svg%3E");

The icon's color is set to red using the fill='red' attribute.

I am trying to figure out how to change the color to blue on hover, without duplicating the icon and just altering the fill color. Creating another CSS class with the same code but a different fill color seems like an inefficient solution as it would increase the file size unnecessarily.

htmlcsssvgbackground-image

Answer №1

To change the color of an icon, you can utilize the filter property:

.box {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 511.999 511.999'%3E%3Cpath fill='red' d='M83.578 167.256H16.716C7...............

}

.box:hover {
  filter: hue-rotate(210deg);
}
<div class="box">

</div>

Another technique is to use the icon as a mask and adjust its color by setting the background-color:

.box {
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 511.999 511.99......................

}

.box:hover {
  background: blue;
}
<div class="box">

</div>

You can also experiment with gradient coloring:

.box {
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 511.999 51.............

}

.box:hover {
  background: linear-gradient(yellow, green);
}
<div class="box">

</div>

Answer №2

In my solution, I have chosen to utilize data URI encoding with the help of encodeURIComponent(). Despite being encoded, the resulting code remains readable and can be easily manipulated in JavaScript. Specifically, I have created a function called setFill() where I include fill='${color}' within the data URI.

test.addEventListener("mouseover", () => {
  setFill(test, "gold");
});

test.addEventListener("mouseleave", () => {
  setFill(test, "black");
});

function setFill(element, color) {
  element.style.background = `url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ctitle%3Ethumb up%3C/title%3E%3Cpath d='M0 0h24v24h-24z' fill='none'%3E%3C/path%3E%3Cpath fill='${color}' d='M1 21h4v-12h-4v12zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06l-1.06-1.05-6.58 6.59c-.37.36-.59.86-.59 1.41v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73v-1.91l-.01-.01.01-.08z'%3E%3C/path%3E%3C/svg%3E")`;
}
#test{
width:50px;
height:50px;
border:1px solid;
background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ctitle%3Ethumb up%3C/title%3E%3Cpath d='M0 0h24v24h-24z' fill='none'%3E%3C/path%3E%3Cpath d='M1 21h4v-12h-4v12zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06l-1.06-1.05-6.58 6.59c-.37.36-.59.86-.59 1.41v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73v-1.91l-.01-.01.01-.08z'%3E%3C/path%3E%3C/svg%3E");  
}
<div id="test" ></div>

If you need assistance encoding SVGs using encodeURIComponent(), here is a useful tool: SVG-encoder

Answer №3

I recently discovered a helpful trick that solved my issue.

  1. Start by copying your code from %3Csvg to svg%3E"
  2. Next, navigate to
  3. Paste your code in the URL-encoded section and in the area above that, replace the fill field with your desired color in HEX format.
  4. Locate your color in encoded format within the Url-encoded section surrounded by %27. For instance, '#ff9500' <=> %27%23ff9500%27, thus #ff9500 <=> %23ff9500.
  5. Finally, copy this encoded color into your code and it should work perfectly! Feel free to reach out if you encounter any issues.

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