Readers decide whether to trust a link in seconds. Generic gray chrome whispers “someone dumped a PDF somewhere.” Your logo, colors, and background say “we meant for you to see this.”
Use a crisp logo file—SVG or high-DPI PNG—and a background image that does not compete with the page edges. If the navigation bar sits on a busy photo, icons disappear. Dark bar, light icons (or the reverse) with enough contrast passes the squint test on a sunny patio.
Season two of your catalog should feel like season one: same logo position, same palette, same outbound link to your store. Random chrome between issues trains people to think each email might be a different company.
Branding sits on top of template choice: a luxury brand might lean 3D; a technical brand might lean binder or reader. Match both to the story you are telling.