This template doesn't show anything on its own, but it adds the Ultraviolet logo in the top right corner of the page.
If the template is on a user page or user talk page, the category Category:Wikipedians who use Ultraviolet is added to the page.
Usage edit
To use this template, simply transclude it anywhere in your user page.
{{Ultraviolet topicon}}
You may choose to prevent your user page from being added to the category. In that case, you should supply the nocat parameter with any value similar to "yes". If you want to force the category on a page outside of the user space or user talk space, you can supply the nocat parameter with any value similar to "no".
{{Ultraviolet topicon|nocat=yes}} <!-- This will stop the category from being added, no matter what -->
{{Ultraviolet topicon|nocat=no}} <!-- This will add the category to the page, no matter what -->