Your brain makes 35,000 decisions a day. This isn't one of them.
One pen. One color. Complete peace.
Twenty quiet minutes for a mind that won't stop.
The monochrome coloring book designed for overthinkers.
🇺🇸 Proud US brand
Thoroughly addictive
"Was sceptical at first as I have been using colouring books for years. These books are tantalisingly addictive."
Love love love this book
"It stops me from endlessly scrolling on my phone, I can just chill and forget about everything."
The best colouring book ever
"I have tried several others with colours and given up but I am already halfway through this one."
I love making no decisions!
"Just use black, colour the places indicated! The result is a professional looking print. Very relaxing."
These books are amazing
"Such great quality, thick paper, and lovely illustrations! My mind has never felt so calm, my nightly ritual."
It's perfect
"From the feel of the paper to the spiral binding. I take it literally everywhere!"
Problem solved
"One colour for everything solves the what colour problem I always had before. So calming for my AuDHD brain."
I love doing these books
"It's so calming and relaxing after a busy day at work. Definitely recommend, you won't regret it."
Thoroughly addictive
"Was sceptical at first as I have been using colouring books for years. These books are tantalisingly addictive."
Love love love this book
"It stops me from endlessly scrolling on my phone, I can just chill and forget about everything."
The best colouring book ever
"I have tried several others with colours and given up but I am already halfway through this one."
I love making no decisions!
"Just use black, colour the places indicated! The result is a professional looking print. Very relaxing."
These books are amazing
"Such great quality, thick paper, and lovely illustrations! My mind has never felt so calm, my nightly ritual."
It's perfect
"From the feel of the paper to the spiral binding. I take it literally everywhere!"
Problem solved
"One colour for everything solves the what colour problem I always had before. So calming for my AuDHD brain."
I love doing these books
"It's so calming and relaxing after a busy day at work. Definitely recommend, you won't regret it."
Mono Moment is a monochrome, one-color coloring book for adults, made for anyone whose mind never quite switches off. Instead of dozens of colors and decisions, you fill bold, simple shapes with a single pen. There is no palette to plan and no wrong way to do it, which is what makes it so calming for an anxious or overthinking mind.
Every one of the 65+ designs is printed on premium 160gsm paper with no bleed-through, and the book lies flat so you can color comfortably anywhere. It is a screen-free, ten-minute ritual for winding down in the evening, easing stress, and giving a busy brain one quiet thing to focus on.
If your brain is still running at 10pm when you just want to rest…
If you've downloaded three meditation apps and abandoned all of them by week two…
If you own coloring books that stressed you out more than they helped…
Then yes - The Original Monochrome Coloring Book by Mono-Moment was made for you.
Your evenings get a different ending:
🫖 Make the tea, settle into the chair
🎧 Put on something quiet, lo-fi, jazz, or your comfort show
📖 Open to any page, the order doesn't matter
🖊️ Pick up one pen, one color
🧠 Let your hands move while your mind finally stops
No decisions. No matching. No wrong answers. Just you, the paper, and twenty quiet minutes of doing one thing.
This isn't a regular coloring book. Everything that usually makes coloring stressful has been removed by design.
One color. That's it.
No palette to plan. No shades to coordinate. Pick up one single pen (black, prefered but can be your favorite color) and start. The illustration is designed to work in any single color.
The image reveals itself as you go.
The page starts as a network of lines you can't quite read. As you color, the scene emerges : a botanical, a still life, a slow afternoon. You won't know what it is until you're halfway in. That's the point: no planning, just presence.
Twenty minutes is all it takes.
Each illustration is designed to be completed in one sitting. Because finishing something - anything - feels good. And after a day of 35,000 decisions, your brain deserves a small, quiet win.
One outline, one pen. That is the whole method.
We will work quickly to ship your order as soon as possible. Once your order has shipped, you will receive an email with further information. Delivery times vary depending on your location.
Shipping
• Free shipping on every order, worldwide
• Delivered in 3-7 days
• Special Editions (Cats & Dogs) are pre-orders: they ship from September 21, then arrive in 3-7 days
60-Day Money-Back Guarantee
Not satisfied? Email us, we'll make it right. Product must be unused.
See it in real life
Three published studies shaped the one-pen, one-color format. Here they are, with links to the journals.
Coloring a structured design for ~20 minutes significantly lowered anxiety (measured with the State-Trait Anxiety Inventory). Free-form drawing did not.
Curry, N. A., & Kasser, T. (2005). Can coloring mandalas reduce anxiety? Art Therapy, 22(2), 81–85. doi.org/10.1080/07421656.2005.10129441
Independent replication, seven years later: structured coloring again reduced anxiety significantly more than free drawing.
van der Vennet, R., & Serice, S. (2012). Can coloring mandalas reduce anxiety? A replication study. Art Therapy, 29(2), 87–92. doi.org/10.1080/07421656.2012.680047
Across 1,112 court rulings, favorable decisions fell from ≈65% to nearly zero as judges made decision after decision, recovering after each break. Decision fatigue is real — this book asks you to make zero of them.
Danziger, S., Levav, J., & Avnaim-Pesso, L. (2011). Extraneous factors in judicial decisions. PNAS, 108(17), 6889–6892. doi.org/10.1073/pnas.1018033108
One pen. One colour. Three steps.

65+ hand-drawn scenes and quote pages. Open anywhere, no order to follow.

Every shape marked with a ✱ gets filled in solid black. One pen, zero decisions.

Big bold shapes mean a page takes an evening, not a month.
Real pages from verified reviews — one pen, one color, their hands.





A curated mix of soft quotes, daily objects and quiet everyday scenes.
Enough for months of 20-minute evenings.
Use any pen, both sides, no mess.
Color without worry. Every page works in any direction
Feels as calm as the experience inside.
Your brain makes 35,000 decisions a day. This isn't one of them.
One pen. One color. Complete peace.
Twenty quiet minutes for a mind that won't stop.
The monochrome coloring book designed for overthinkers.
3 questions · 20 seconds
Be honest — how does your brain feel by 9pm?
Ever tried a classic coloring book?
What would a good evening look like?
Your result
One pen. Zero decisions.
Made for evenings like yours.
Classic coloring books make you pick between 24 colors — that’s just more decisions. Here there’s one pen, marked shapes, and a page you actually finish tonight.
“I have tried several others with colours and given up but I am already halfway through this one.”
Julie M. · Verified reviewResearchDecision fatigue: Danziger, Levav & Avnaim-Pesso, PNAS (2011) · sequential decisions measurably degrade the quality of our judgment through the day. Structured coloring: Curry & Kasser, Art Therapy: Journal of the American Art Therapy Association (2005) · structured colouring reduced anxiety significantly more than free drawing. Read the PNAS study · Read the Art Therapy studyi shows that decision fatigue affects every aspect of our mental health. Other coloring books hand you 60 colors and call it relaxing. That's 60 more decisions at the end of a day that already had 35,000.
Mono-Moment removes the choice entirely. Our single-color approach transforms coloring from a stressful activity into a truly meditative practice.
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Other brands | |
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| Decision-free coloring experience | ||
| Premium 160gsm paper (no bleed-through) | ||
| Scientifically-backed anxiety reduction | ||
| Designed for overthinkers and anxious minds | ||
| Finish a page in one evening (big bold shapes) | ||
| 65+ hand-drawn scenes · double-sided (zero AI art) |
Experience the calming power of monochrome coloring. No colors to choose. No screen to open. Just one page and twenty minutes that ask nothing of you. Perfect for overthinkers seeking stress relief through mindful, therapeutic coloring.
After the kids are in bed. Before the scroll spiral begins.
Self-care moments
Tea, blanket, playlist, this book. The perfect slow-down combo.
On the go
Trains, planes, waiting rooms. Your calm, wherever you are.
No color choices
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20 minutes to calm
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Science-backed anxiety relief
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Decision-free coloring
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Screen-free evening ritual
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Travel-friendly format
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Our team is here to answer your questions by contact form or by phone on +1 929-597-7620 from Monday to Friday, 8:30 a.m. to 7:00 p.m. and Saturday, 10:00 a.m. to 5:00 p.m
A one color coloring book (also called a monochrome coloring book) is an adult coloring book designed for one single pen. Instead of choosing between dozens of colors, you fill bold, flowing designs with just one color, which turns coloring into a calm, decision-free ritual. Our One Color Coloring Book is the original: 65+ bold illustrations on thick 160gsm paper, made to quiet an overthinking mind.
Surprisingly, no. Removing color decisions lets you focus entirely on the meditative act of filling in shapes. Most customers tell us it's more relaxing precisely because it's simpler. Your brain wants boring right now—trust us.
Any pen you love. Our 160gsm paper handles markers, gel pens, fineliners, and even light brush pens without bleed-through. We recommend water-based markers (like Tombow or Crayola SuperTips) for the smoothest experience. Avoid alcohol-based markers like Copics.
Most illustrations take 15-30 minutes—perfect for an evening wind-down or a lunch break. We intentionally designed them to be completable in one sitting, because finishing something feels good.
Multiple peer-reviewed studies show that 20 minutes of structured coloring significantly reduces anxiety. It calms the amygdala (your brain's stress center) and promotes flow states similar to meditation. That said, we're a coloring book, not a replacement for professional mental health support.
60-Day Money-Back Guarantee. Refunds accepted within 60 days of delivery for unused items.
Yes! We ship worldwide. US shipping is FREE from $19 ($4.95 below), free over £19 in the UK and A$44 in Australia, free everywhere else. Delivered in 3-7 days, tracked at every step.
60-Day Money-Back Guarantee
Refunds accepted within 60 days of delivery for unused items.
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When you sit down with a typical coloring book, the first decision you make is not where to put the pen — it is which pen. That choice quietly cascades. You start comparing palettes. You worry about "ruining" a page. The point of coloring as a wind-down — not thinking — gets lost. Removing color from the equation removes the friction. You pick up one pen, you start anywhere, and the only signal your brain receives is follow the line. Research on coloring as a stress-reduction practice consistently finds that structured, low-decision drawing produces measurable drops in state anxiety within 15 to 20 minutes.
The 160 gsm paper is engineered for water-based pens. Recommended: brush pens (Tombow Fudenosuke, Pentel Pocket Brush), fineliners (Sakura Pigma Micron, Staedtler), gel pens, colored pencils. Avoid alcohol-based markers like Copic — they will bleed through any printer paper.
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