# How to invert colors using CSS

> Learn how to invert the colors of an element or image in CSS with filter: invert(100%), handy inside a prefers-color-scheme: dark query for dark mode.

Author: [Flavio Copes](https://flaviocopes.com/about/) | Published: 2019-10-05 | Topics: [CSS](https://flaviocopes.com/tags/css/) | Canonical: https://flaviocopes.com/css-invert-colors/

I had this problem. I added a "black on white" image on a page, only to realize that with dark mode, my page correctly changes the background to black, but the image remains white on black.

Kind of bad.

So I added this rule to my CSS to detect dark mode and automatically invert the color of the image:

```css
@media (prefers-color-scheme: dark) {
  .my-image {
    filter: invert(100%);
  }
}
```

It's not 100% accurate in my case, because my dark background color is not perfectly black, but it's better than nothing.

To make things perfect you could also add the image using a CSS background image instead of an `img` tag in HTML, and I could easily swap that in dark mode.