Nano Banana handles flat-vector logo marks and brand mascots well because it is tuned for stylized, illustrated output with clean outlines and limited palettes — exactly what a scalable logo needs. This guide covers the prompt structure and copy-paste templates for tech, food, and service brand logos.
Why Nano Banana works for logos
- Stylized flat-vector output — not photorealistic, which logos should not be
- Clean, thick outlines that survive scaling
- Limited-palette discipline — logos need 2–3 colors, not gradients
- Consistent mascot identity across campaign variations
The logo prompt formula
Keep logo prompts under 25 words and structure them as: [Subject] + [Limited palette] + [Flat vector / thick outline] + [Centered on white] + [Scalable mascot logo]. Always specify "centered on white" and "scalable" to avoid background scenery creeping in.
Tech and app logos
✦ Prompt templates
Logo mark: geometric hummingbird, limited teal-and-cream palette, flat vector, thick outline, centered on white, scalable mascot logo.
App icon logo: rounded-square frame, bold letter "A" mark, indigo-and-white palette, flat vector, minimal, centered.
Logo mark: abstract circuit-node bird, limited blue-and-grey palette, flat vector, thick outline, centered on white.
Food and beverage mascots
✦ Prompt templates
Brand mascot: friendly round bear, warm brown fur, cream muzzle, green apron, small chef hat. Clean commercial illustration, waving pose.
Brand mascot: small coffee-cup character, cream body, brown lid hat, big eyes, limited brown-and-cream palette, flat vector, thumbs up.
Logo mark: geometric wheat stalk, limited gold-and-green palette, flat vector, thick outline, centered on white, bakery logo.
Service and lifestyle logos
✦ Prompt templates
Logo mark: minimalist house with a leaf, limited green-and-grey palette, flat vector, thick outline, centered on white, real-estate logo.
Brand mascot: small friendly robot, round metallic-blue body, white panels, large visor eyes. Clean vector style, limited blue-and-white palette, pointing pose.
Logo mark: geometric mountain-and-sun, limited orange-and-navy palette, flat vector, thick outline, centered on white, outdoor brand logo.
Tips for clean logo output
- Always say "flat vector" and "thick outline" — without them you get painterly or shaded results
- Always say "centered on white" — otherwise Nano Banana adds background scenery
- Keep the palette to 2–3 named colors ("teal-and-cream", not "colorful")
- For mascot logos, repeat the same mascot block across campaign variations to keep identity
What Nano Banana logos are not
- Not vector SVG files — export the raster and trace in a vector editor if you need scalable SVG
- Not text-typography logos — Nano Banana draws icon marks and mascots, not wordmarks
- Not photorealistic brand photography — use Seedream 4.0 for that