A colophon is the emblem, logo, or imprint of a publisher. Colophons often appear on the title page of a book.
Businesses usually have distinctive logos, and publishers are no different. The emblem or imprint of a publisher is called a colophon, and you can think of it as their brand. A colophon appears on every book put out by a publisher, and it often appears on the spine of the book and/or on the title page. The colophon lets everyone know who published the book. This word is from Greek via Latin and originally meant "finishing touch."