I didn't mention it, but theme customization is also available for #Pixelfed. Don't hesitate to share your new themes with us. We will add soon a theme page in fedilab.app with screenshots. They will be suggested for import.
@fedilab I don't know if there will be plans to create a place to share some user-designed themes (other than those you include by default with Fedilab), but in the meantime maybe it wouldn't be a bad idea to share them with the HT #FedilabThemes