LinkedIn Brand Kit: single image ads only, colors, fonts and voice

LinkedIn's Brand Kit holds four things: colors, a heading font, a body font and a brand voice, and LinkedIn's help page says single image ads are currently the only ad format that uses it (read 2026-10-02). Sume has no brand-kit object in the docs I read, so on Sume you carry the same rules inside your prompt and reference images.

What LinkedIn's help page says

Brand kits are optional. LinkedIn can assemble one automatically from your Company Page and past content, and you can also build one by hand and edit or delete any field later (read 2026-10-02). If your account lacks signals, such as a website on your Page or enough organic posts, the automatic kit may not appear.

Carry the kit onto Sume images

If you generate your ad image outside LinkedIn, write the kit down as plain constraints. The Image API takes a prompt and reference images, so the logo, a product shot and a prior on-brand ad can all be references.

• Name the hex colors in the prompt and say where they appear.
• Attach the logo as a reference rather than describing it.
• Say how many times a headline should appear, and check spelling by eye.
• Keep the output ratio to LinkedIn's single image sizes; see LinkedIn ad image size.

Limits to be honest about

Sume does not store your brand rules between requests, so repeat them each time or keep them in a saved prompt of your own. It also cannot write into a LinkedIn Brand Kit. Fonts are the weakest point: an image model draws letterforms, it does not load your font file. For exact type, put the headline in LinkedIn's intro text or add it as a layer in your own design tool.