Prompt library · Coloring pages
Ten tested prompts for printable line art — bold simple scenes for small children, detailed storybook worlds, and intricate mandalas for adults. Every card shows the unedited output, ready to send to a printer.
Three phrases do almost all the work: “black and white line art coloring page”, “no shading, no grey, no fill”, and “pure white background”. Without them the model helpfully adds soft grey tones and drop shadows, and a shaded page is useless to color. The structure that holds up is: “Black and white line art coloring page of [scene with two or three elements], [line weight], clean closed outlines, no shading, pure white background”. Line weight is the setting that matters most — “thick bold outlines with large simple shapes” for toddlers, “medium detail” for school age, “intricate fine linework” for adult pages.
Say “closed outlines” if you plan to hand the file to children with digital coloring apps: open gaps let the fill bucket flood the whole page. Print at portrait 3:4 and the page drops onto A4 or US Letter with no cropping. All ten below are unedited outputs generated on BananaBanana — at $0.03 per Lite image, a themed 30-page book costs under a dollar to draft.
Every image below is the unedited output of the prompt on its card — no cherry-picking across dozens of attempts, no retouching. The model badge shows exactly what generated it and what it cost.
Black and white line art coloring page of a friendly unicorn standing in a meadow of large simple flowers, a rainbow arcing behind it and three fluffy clouds above. Thick bold outlines, large open shapes for small hands, no shading, no grey, pure white background.
Black and white line art coloring page of a cheerful long-necked dinosaur eating leaves from a tall palm while a small spiky dinosaur watches from behind a fern, volcano outline in the distance. Thick bold outlines, simple closed shapes, no shading, pure white background.
Black and white line art coloring page of a coral reef with a smiling sea turtle, three striped fish, waving seaweed and a scattering of bubbles rising to the surface. Medium-weight outlines with a few decorative patterns inside the coral, no shading, pure white background.
Black and white line art coloring page of a village of mushroom houses with round doors and shuttered windows, a winding stone path, a tiny bridge over a stream and fireflies in the air. Storybook detail with medium linework, no shading, pure white background.
Black and white line art coloring page of a rocket blasting past a ringed planet, two smiling stars and a crescent moon, with a small astronaut waving from the porthole. Thick playful outlines, large simple shapes, no shading, pure white background.
Black and white line art coloring page of a symmetrical butterfly whose wings are filled with mandala patterns — concentric petals, teardrops and fine dots — framed by a circular border of leaves. Medium-fine linework, perfectly mirrored, no shading, pure white background.
Black and white line art coloring page of a thatched cottage with climbing roses around the door, a picket fence, a watering can on the path and hollyhocks along the wall. Detailed storybook linework with varied textures, no shading, pure white background.
Black and white line art coloring page of a chunky tractor with big treaded wheels beside a barn, three hens pecking in the foreground and a haystack behind. Thick bold outlines, large open areas, no shading, pure white background.
Black and white line art coloring page of a cheerful boxy robot holding a wrench in a workshop, surrounded by gears, a toolbox and a shelf of spare parts. Medium-weight outlines, clear closed shapes, no shading, pure white background.
Black and white line art coloring page of an intricate floral mandala with eight-fold symmetry: layered petals, paisley shapes, fine hatching-free scrollwork and a dense border of tiny leaves. Fine detailed linework for adult coloring, no shading, pure white background.
Left to itself the model adds soft tones and shadows, which makes a page impossible to color. Saying it twice — “no shading, no grey, pure white background” — is not redundant, it's insurance.
“Thick bold outlines, large open shapes” for toddlers; “medium linework” for school age; “intricate fine linework” for adult pages. It's the single setting that decides who the page is for.
Every shape fully enclosed means the fill bucket in a digital coloring app stays inside the lines — and it prints as a cleaner page too.
A 3:4 page drops onto A4 and US Letter with even margins. Generate at 2K on Nano Banana 2 and the lines stay crisp at full-page size.
10 promptsTen tested prompts covering the styles artists actually work in — single-needle fine line, American traditional, heavy blackwork, dotwork mandala, watercolor and Japanese irezumi. Each card shows the unedited result and the model behind it.
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10 promptsTen tested prompts for kawaii characters, retro badges and glossy holographic designs — each generated as a die-cut sticker with a clean white border, ready for print sheets or messenger packs.
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10 promptsTen tested prompts for logo symbols — monoline outdoor marks, geometric animals, vintage emblems, negative-space monograms and gradient app icons. Each card shows the unedited output and the model that made it.
Browse promptsFlat line art is the case where the $0.03 model is all you need.
Read the guideThe prompt structure behind every page on this list.
Read the guideDraft a whole coloring book without a subscription.
Read the guideYes — you own the images you generate on BananaBanana, including for print-on-demand books. Note that self-publishing platforms such as Amazon KDP require you to disclose AI-generated content when you upload, so plan for that step.
Generate at 2K on Nano Banana 2 for a full-page print. Lite renders at 1K, which is fine for screen use and quick drafts but can show softening in fine linework at A4 size.
Because the prompt didn't forbid it. Add “no shading, no grey, no fill, pure white background” explicitly — and if a stray tone still appears, one pass of levels in any editor snaps it back to pure black and white.
The prompts here describe gentle, neutral scenes on purpose, and every image runs through the model's safety filters. As with any generated content, glance at a page before printing a batch for a classroom.
Fix the style sentence — line weight, detail level, background — and change only the scene line for each page. Keeping that wording identical across thirty prompts is what makes the set look like one book rather than thirty downloads.
Every new account starts with a free $0.20 balance — enough to test six image prompts before paying anything. No subscription, no credit card, crypto top-ups from $1.