Think
in colour.
A5 notebooks in saturated colour, written in white gel ink. The colour isn't decoration. It is how the page changes the way your mind works.
The colour you write on changes how you think.
Two decades of colour-cognition research show that the visual field around a task quietly shifts performance. We built a notebook around the finding, one colour per kind of thinking.
Open thinking
Blue surroundings improved performance on creative, exploratory tasks. The calm, open associations of sky and water make the mind feel safe to wander. The original Chroma, and still the all-rounder for thinking freely.
More ideas
A brief glimpse of green before a creative task measurably increased creative output, beating blue, grey and red across four experiments. The colour of growth, used for the work of making new things.
Sharper focus
Red environments improved performance on detail-oriented tasks, memory and proofreading, by as much as 31% over blue. It primes care and accuracy. Reach for it when you are editing, planning or getting the details right.
Deep work
High contrast, low distraction. A dark page with white ink strips the visual noise so a single line of thinking can carry. Less a priming effect, more a calm room for the mind to settle into.
A note on the science: the blue, green and red effects are drawn from published, peer-reviewed studies on colour and cognition. Findings describe averages across study groups, not guarantees for any individual, and the black edition is offered for its contrast and focus rather than a specific priming study. We would rather tell you that plainly than oversell it.
Four editions. One idea.
Same notebook, same paper, same white pen. Pick the colour for the work in front of you. The blue is where it all started. £19.95 each.
Chroma One · Blue
Chroma One · Green
Chroma One · Red
Chroma One · Black
Chroma One · Blue
Every summit looks impossible from the base. You do not leap it, you climb it, one written step at a time. The impossible is just a plan you haven't written down yet.
What people write to us.
The red one genuinely changed how I edit. I keep my messy drafts in green and do the cutting in red. Sounds silly, works.
White ink on the black pages feels like writing on a chalkboard you actually want to use. Brilliant for late-night ideas.
Started with the blue for brainstorming and now I own all four. The paper handles the gel pen with zero bleed. Lovely object.
FAQ
Both effects we cite are from peer-reviewed journals: Mehta & Zhu in Science (2009) for red and blue, and Lichtenfeld et al. in PSPB (2012) for green. We describe what the studies actually found and do not claim guaranteed results for any one person.
Each page is saturated colour, so a normal pen would vanish. Every Chroma ships with a white gel pen designed for the paper: high contrast, smooth flow, minimal bleed.
Dot grid as standard. It is the most flexible: structure when you want it, freedom when you don't. Blank and lined editions are on the roadmap.
98 coloured pages (49 sheets) of 100gsm bleed-resistant paper, in A5 (148 × 210 mm), pocketable but roomy enough to think on.
Please do. Plenty of people keep blue for open thinking, green for ideas, red for editing and black for deep work. Buy any two or more and UK shipping is on us.