Switch from monochrome to color when hovering inside a clipping mask

I have successfully mastered the technique of changing an image from grey to color on hover using CSS and JavaScript. However, I am curious about whether it is possible to achieve the same effect using a clipping mask.

Attached is an image that illustrates exactly what I am attempting to accomplish. Most examples I have come across either change the entire image or only a specific area around the mouse pointer. My goal is to have a designated section or clipped region of an image transform in color upon hovering over it.

View the group shot displaying the highlighted colored area

csshovermaskclipping

Answer №1

To achieve this, consider utilizing SVG filters in conjunction with CSS.

  • Create a shape using a vector tool and then convert it to base64
  • Apply a filter using <feColorMatrix> on the image. This filter could be blur, grayscale, etc (for more details on SVG filters)
  • Ensure the correct dimensions are set to apply the shaped filter over the background image.

An example is provided below:

svg {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

image {
  filter: grayscale(1);
}
image:hover {
  filter: url(#blurlayer2);
}
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
  <defs>
          <filter id="blurlayer2" width="120%" height="100%">
            <feColorMatrix
    type="matrix"
   values='0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0' />
            <feGaussianBlur  stdDeviation="0" result="blur"/>
            <feImage id="feimage" xlink:href="data:image/svg+xml;charset=utf-8;base64,PHN2ZyB3aWR0aD0iMTAyNCIgaGVpZ2h0PSIzMDAiIHhtbG5zPSJodHRwOi8vd3d3LnczLm...Encoded Base64 Image Data...

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