One file carries the entire brand kit — colors, rich-text notes, logo files and fonts — so a teammate gets the full picture, not a bare palette. No missing assets, no follow-up questions about which logo is current.
On import you decide whether the kit arrives as a fresh collection or merges into one you already have. That makes it easy to bring in a client's existing brand or fold a colleague's additions into your master kit.
Sharing covers other people; iCloud sync covers you. Your whole library — including the logo, font, and document files — stays current on every Mac you own, through your private iCloud storage, no export needed.
Everything in the collection: colors, rich-text CVI notes, logos and fonts, packaged as one self-contained file you can send to anyone.
Use Tools > Import Collection or press Cmd-Shift-O, then choose to import it as a new collection or merge it into an existing one.