Oliver: "I know that this is totally subjective"
I definitely agree. That is one reason I think it would be cool if LMMS had better theme support.
Anyway, here is another update, with SVG and PNG files. Note that I use GIMP to add a slight shadow around them after I export. Any other changes I need to make?
(trying Google Drive instead of attachments. If you can't download or see this file, let me know)