How to Make a Coloring Book for KDP

Coloring books remain one of the most accessible ways to publish on Amazon KDP: no writing, visual quality you can judge at a glance, and a buyer base that keeps coming back for fresh themes. This is the complete workflow we use ourselves — from AI art generation to a print-ready interior — with the two technical steps most first-time publishers get wrong: vector conversion and trim setup.

1. Pick a theme buyers actually search

Browse Amazon's coloring bestsellers and note the niches: animals in costume, mandalas, seasonal themes, cute food, vehicles for toddlers. Pick something you can produce thirty to fifty consistent pages for — consistency of style sells books, single great pages do not.

2. Generate the line art

Midjourney (or any AI image tool) produces coloring-book art reliably if you prompt for it explicitly. The essentials: ask for clean coloring book line art, demand thick black outlines, white background, and forbid what printers hate: no shading, no grayscale, no hatching. Our prompt guide covers this in depth with tested prompt templates.

Always use the upscale option before downloading — larger source images convert into noticeably smoother vector curves.

3. Convert every page to vector (the step most people skip)

AI output is a raster image with anti-aliased edges: zoom in and the "black" lines fade through gray into white. Printed at 300 DPI, that reads as muddy or fuzzy — and it is the most common reason coloring books look amateurish in print.

Run each page through our free Midjourney converter: it thresholds away the gray edges, removes JPEG speckles, and outputs true vector SVG that stays perfectly crisp at any print size. A full book takes a few minutes; there is no page limit.

4. Set up the interior correctly

Trim size: 8.5×11" is the coloring-book standard; 8.5×8.5" square works well for kids' books.
Bleed: if your art touches the page edge, use KDP's bleed dimensions (add 0.125" on three sides). Full-page framed art without bleed is simpler and looks equally professional.
Margins: keep at least 0.375" inside margin (gutter) so art never disappears into the binding — more for books over 150 pages.
One-sided printing: place each artwork on a right-hand (odd) page with the back left blank, so markers never bleed through onto the next picture.

5. Assemble and export the PDF

Place your SVG pages into your layout tool of choice (Affinity Publisher, InDesign, even Canva) at the exact trim size and export a PDF with fonts and vectors embedded. Vector line art keeps the file lean — a 50-page interior typically lands well under KDP's limits.

6. Cover, upload, and proof

The cover is a separate file at 300 DPI — this one should be rich raster artwork. Upload interior and cover in KDP's Print Previewer, then order a physical author proof before publishing: line-weight problems that hide on screen are obvious on paper.

Checklist: consistent theme · vector-converted pages · correct trim + gutter · art on odd pages · embedded-vector PDF · physical proof ordered.