You can email your theme to steve0greatnessiscool+rati[at]gmail.com
.
When emailing it, please include this information with your theme:
Also make sure to include your themes CSS file with your email, otherwise it cannot be added.
You can also submit your theme in a PR to the repository this is hosted at: roundabout-host.com/steve0greatness/ThemeIndex (or its mirror at codeberg.org/Steve0Greatness/ThemeIndex).
Simply place your theme CSS into a subdirectory under the theme direcotry(this should be your username), then include a bit of metadata in the themes.xml file in the project root.
This meta data should be as follows:
<theme>
<title>{Theme Name}</title>
<author
uri="https://{profile link}"
instance="{profile instance}"
username="{author username}"
>{Author display name}</author>
<uri>{pathto/theme.css}</uri>
</theme>