Verified against Nano Banana / Gemini 3.1 Flash Image · 2026-08-03
Turn a hex palette into a brand mood-board with Nano Banana
A composited flat-lay mood-board brief for Nano Banana (Gemini 3.1 Flash Image) that locks every object and surface to a fixed hex palette — the natural next step after generating a palette with the Colour Palette Generator.
The prompt
Ready to copy — highlighted parts are example details you can swap.
A flat-lay brand mood-board photograph showing a swatch of linen fabric, a small ceramic bowl, a sprig of dried eucalyptus, a stack of blank business cards, a fountain pen arranged on a lightly textured plaster-grey tabletop, every object and the surface strictly limited to this color palette: #2E4034 (deep forest green), #C9A66B (warm brass), #F5F0E6 (warm off-white), #7A8B99 (dusty slate blue), soft natural window light from one side, gentle visible shadows, shot from directly overhead, loosely gridded, generous negative space, editorial flat-lay style, no text, no logos
Customize the highlighted detailsoptional — the prompt above already works
Why this works
Nano Banana's grounded, photoreal strength extends naturally to compositing a believable arrangement of real-world materials, which is what a brand mood-board actually is. Pasting exact hex codes into the prompt — rather than only color-name adjectives — gives it a much tighter, more literal color target, which matters because a mood-board is judged on color accuracy first, not artistic license. Like Flux, Nano Banana has no negative-prompt field, so "no text, no logos" only works as a positive instruction stated inside the brief itself, not as a separate exclusion list. The practical workflow this is built for: run the Colour Palette Generator first, then paste its hex output straight into hex_palette here.
What you get back
An overhead flat-lay image with the requested objects color-graded toward — not laser-precise to — the specified hex codes; treat it as directional mood-board material for a pitch or brand deck, not a pixel-accurate color proof.
Verified against
Nano Banana / Gemini 3.1 Flash Image Gemini 3.1 Flash Image · 2026-08-03
Changelog
- 2026-08-03 — Initial publish, verified against Nano Banana (Gemini 3.1 Flash Image) for hex-locked flat-lay composition.
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