# Conversion to grayscale

[i3](https://docs.transparentedge.eu/config/i3), our image management solution, allows you to dynamically and transparently convert your images to grayscale. 

To do this, we use our `TCDN-i3-transform` header, specifying the desired operation, which in this case is `grayscale`. 

For example, if you wanted to serve grayscale images on your domain `mi-dominio.es`, you can simply deploy a [VCL](https://docs.transparentedge.eu/config/vcl) [configuration](https://docs.transparentedge.eu/config) similar to the following from the [dashboard:](https://docs.transparentedge.eu/getting-started/dashboard)

<pre class="language-c"><code class="lang-c"><strong># i3 - grayscale
</strong>sub vcl_recv {
    if (req.http.host == "www.mi-dominio.es") {
        set req.http.TCDN-i3-transform = "grayscale";
    }
}
</code></pre>