Button background must be grayscale, while the text should remain unaffected

I have a variety of buttons with different background images. My goal is to apply a grayscale filter to the backgrounds by default and remove the filter on hover, without affecting the color of the button text.

Currently, when I apply the grayscale filter, the text of the buttons also becomes grayed out. I need help figuring out how to only apply the grayscale filter to the button backgrounds, not the text itself.

Right now, I'm using a CSS class for the buttons:

.box {
-webkit-filter: grayscale(100%);
filter: grayscale(100%);
position:relative;
color: red;
cursor:pointer;
text-align: center;
width: 160px;
height: 160px;
}
.box:hover {
-webkit-filter: grayscale(0%);
filter: grayscale(0%);
color: blue;
}

And in my HTML code, I'm adding the backgrounds for each button like this:

<button onclick="buttonFunction()" button class="button box" style="background: url(background1.jpg); background-size: 100%;" >Gray button text:( </button>

Does anyone have any ideas on how to achieve a grayscale filter on button backgrounds while keeping the button texts colored? Thanks!

cssbuttontextbackgroundgrayscale

Answer №1

When you apply the filter property to an element, it will impact the children of that element and there is no way to unset or reset the filter property for them.

If using pseudoelements as suggested in other responses is not an option for you, consider modifying your HTML structure to achieve the desired effect.

You can insert the image as an img element within the button and place the text in a span. Then, you can apply the filter to the img element.

.box {
  cursor: pointer;
  width: 160px;
  height: 160px;
  position: relative;
  padding: 0;
  display: inline-flex;
  justify-content: center;
  align-items: center;
}

.box img {
  -webkit-filter: grayscale(100%);
  filter: grayscale(100%);
  position: absolute;
  max-width: 100%;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
}

.box:hover img {
  -webkit-filter: grayscale(0%);
  filter: grayscale(0%);
}

.text {
  color: red;
  z-index: 1;
}

.box:hover .text {
  color: blue;
}
<button onclick="buttonFunction()" button class="button box"><img src="https://unsplash.it/200x200"><span class="text">Gray button text:(</span></button>

Answer №2

When considering pseudo elements, Temani Afif suggests that they are the way to go. However, I have a slightly different approach to positioning that could be more accurate and easier to implement in a responsive design.

The crucial step is ensuring that the .box has the same height and line-height, which will also be the height of our :after content. By using absolute positioning (0-0-0-0), it will automatically center itself.

.box {
  position: relative;
  color: #ff0000;
  text-align: center;
  width: 300px;
  height: 300px;
  line-height:300px;
}

.box:before {
  content: ' ';
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  filter: grayscale(100%);
  background: url(https://upload.wikimedia.org/wikipedia/commons/thumb/e/e9/16777216colors.png/220px-16777216colors.png);
  background-size: cover;
}

.box:hover:before {
  filter: grayscale(0%);
}

.box:after {
  content: 'Text Text Text';
  position: absolute;
  left:0;
  bottom:0;
  right:0;
  top:0;
  display: inline-block;
  vertical-align: middle;
}
 <button type="button" class="box">Button</button>

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