Label is a related term of colophon.
In obsolete|lang=en terms the difference between label and colophon
is that
label is (obsolete) a tassel while
colophon is (obsolete) a finishing stroke or crowning touch
.
As nouns the difference between label and colophon
is that
label is a small ticket or sign giving information about something to which it is attached or intended to be attached while
colophon is in manuscripts (typically before the invention of printing), the note, usually at the end, left by the scribe who copied it, giving information on his exemplar, where and when the copy was made, and sometimes, his own name.
As a verb label
is to put a label (a ticket or sign) on (something).