> For the complete documentation index, see [llms.txt](https://docs.transparentedge.eu/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.transparentedge.eu/config/i3/conversion-to-grayscale.md).

# Conversion to grayscale

[i3](/config/i3.md), 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](/config/vcl.md) [configuration](/config/easy-setup.md) similar to the following from the [dashboard:](/getting-started/dashboard.md)

<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>


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