CSS Reference
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Quick Reference

The filter property defines visual effects (like blur and saturation) to an image element.

img {
    filter: sepia(100%);
}

Default

Default valuenone
Inherited valuesno
Can it be animated?yes

These are the allowed values.

FilterDescription
noneSpecifies no effects (default)
blur(px)Applies a blur effect to the image; larger values mean more blur (0 is the default)
brightness(%)Adjusts the brightness of the image
  • 0% will make the image completely black
  • 100% (1) is the default and represents the original image
  • Values over 100% will brighten the image
contrast(%)Adjusts the contrast of the image
  • 0% will make the image completely black
  • 100% (1) is the default and represents the original image
  • Values over 100% will give the image more contrast
drop-shadow(h-shadow v-shadow blur spread color)Applies a drop shadow effect to the image
  • h-shadow - Specifies a pixel value for the horizontal shadow; negative values place the shadow to the left of the image (required)
  • v-shadow - Specifies a pixel value for the vertical shadow; negative values place the shadow above the image (required)
  • blur - This is the third value and must be in pixels; adds a blur effect to the shadow; a larger value will create more blur; negative values are not allowed (0 is the default)
  • spread - This is the fourth value and must be in pixels; positive values will cause the shadow to expand and grow bigger; negative values will cause the shadow to shrink (0 is the default) (not all browsers support spread)
  • color - Adds a color to the shadow
grayscale(%)Converts the image to grayscale
  • 0% (0) is default and represents the original image
  • 100% will make the image completely gray (used for black and white images)
hue-rotate(deg)Applies a hue rotation on the image; the value defines the number of degrees around the color circle the image samples will be adjusted (0deg is default, and represents the original image)
invert(%)Inverts the samples in the image
  • 0% is default and represents the original image
  • 100% will make the image completely inverted
opacity(%)Sets the opacity level for the image. The opacity-level describes the transparency-level, where:
  • 0% is completely transparent
  • 100% is default and represents the original image (no transparency)
saturate(%)Saturates the image.
  • 0% will make the image completely un-saturated
  • 100% is default and represents the original image
  • Values over 100% provides super-saturated results
sepia(%)Converts the image to sepia.
  • 0% is default and represents the original image
  • 100% will make the image completely sepia
url()The url() function takes the location of an XML file that specifies an SVG filter, and may include an anchor to a specific filter element - for example: filter: url(svg-url#element-id)
initialSets this property to its default value
inheritInherits this property from its parent element

Using JavaScript

The HTML element can also be styled using JavaScript and the element’s id.

document.getElementById('my_img').style.filter = 'sepia(100%)';
<button onclick='my_function()'>Click Here</button>

<script>
function my_function() {
    document.getElementById('my_img').style.filter = 'sepia(100%)';
}
</script>

CSS Notes:

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