Is colour by number real art?
The composition, palette and boundaries are all decided before you arrive. That makes it craft rather than authorship — which is not a demotion, since most enjoyable making is not authorship either.
The question gets asked in a dismissive tone and answered in a defensive one, which is a shame, because it is a genuinely interesting question with a clear answer that neither side usually reaches.
The case against
Take the objection at full strength, because the weak version is easy to knock down and proves nothing.
In a colour-by-number picture, every decision that constitutes artistic authorship has been made before you arrive. The subject was chosen by someone else. The composition — what is where, what is emphasised, how the eye moves through the image — was determined by someone else. The palette was selected by someone else, and not merely which colours but how many, and which sits next to which. Most decisively, the boundaries between colours were drawn by someone else, and those boundaries are the picture.
What is left for you is to determine which of the predetermined colours goes into which of the predetermined regions, and even that is not a choice — it is written on the canvas as a number. Two people colouring the same picture correctly produce identical results. There is no version of the work that is recognisably yours.
So the output is fully specified in advance and you are performing a lookup. That is execution, not creation, and calling it art stretches the word past usefulness.
This argument is sound. It should not be waved away.
The case for
The counter-argument does not dispute any of that. It disputes the assumption that execution is not part of art.
Historically, that assumption is unusual and recent. Renaissance and Baroque workshops operated on exactly this division: a master set the composition and the assistants executed large parts of the painting. Frescoes were transferred from full-size cartoons — drawings pricked or incised to reproduce the design onto plaster — so that the work on the wall was, in a real sense, the filling in of predetermined outlines. Printmaking editions are produced by a printer who is often not the artist, and the quality of the impression depends heavily on that printer’s craft. Colour separation in commercial printing was a specialist skill that could make or ruin an image.
In none of these cases do we say the executing hand was doing nothing. We say the authorship belongs to one person and the craft to another, and that both are real. The idea that a work is only meaningful if a single individual made every decision is a Romantic notion, not a permanent feature of how art has been made.
And skilled reproduction is genuinely a craft. Copying well is hard. Anyone who thinks otherwise has not tried it.
The honest resolution
Both arguments are right about different things, and the disagreement dissolves once you separate two questions that keep getting merged.
Is colour by number an act of authorship? No. Clearly not. The aesthetic decisions were made elsewhere and you did not participate in them. Anyone claiming otherwise is defending something that does not need defending.
Is it a worthwhile making activity? Yes, and this is where the dismissive version fails. Almost everything people enjoy making is not authorship. Cooking from a recipe is not authorship. Playing a piece of written music is not authorship. Knitting from a pattern, building a model, assembling furniture, following a woodworking plan — none of these are authorship, and all of them are satisfying in ways that have nothing to do with originality. The pleasure of execution is a real and distinct pleasure, and it is available far more often than the pleasure of invention, because it does not require you to have anything to say.
So: colour by number is a craft activity rather than an act of authorship. That is the accurate description, and it is not a demotion.
Is the result yours to share?
This is a separate question and it has a separate answer, which is worth stating because people conflate the two.
A completed picture is yours as a completed rendering. You did the work, it represents time you spent, and there is nothing dishonest about showing it. What it is not is an original composition, and presenting it as one would be dishonest. The distinction is the same one that applies to a performance of a piece of music: the recording is yours, the piece is not.
In practice nobody is confused about this. People post finished colouring pages with obvious understanding of what they are posting, and the response they get is about the effort and the finish, not about the composition.
Where the artwork here comes from
Since provenance is part of this question, it is worth being specific about Numbrush’s own plates rather than vague.
They are generated procedurally at build time by an in-house tool. The geometry is built from flat filled polygons drawn with no antialiasing, so that the regions quantise cleanly rather than blurring into each other at the edges. Symmetry is produced by authoring a single wedge and rotating it, which is why the mandalas and rose windows have exact rotational symmetry rather than approximate. The palettes are curated by hand rather than generated.
That output is then processed into flat labelled regions, with regions below an area threshold merged into their neighbours so that nothing ships that is too small to hit with a finger. None of the generation tooling ships inside the app; only the finished plates do. There is no licensed third-party image library involved at any point.
That provenance is itself relevant to the argument. The authorship in these pictures is distributed across the person who wrote the generator, the person who authored the wedge, and the person who chose the palette. It was already not a single-hand act of creation before you opened the app.
The 1950s argument, again
It is worth knowing that this exact debate was had seventy years ago about the Craft Master kits, in almost the same words. Critics said the kits were counterfeit art that gave people the appearance of painting while removing everything that makes painting an act of authorship. That is the same argument, made about the same format, by people who were confident.
The Smithsonian later exhibited those kits and finished canvases as artefacts of American popular culture. Not because anyone reversed the aesthetic judgement, but because the objects turned out to document something — a specific idea of leisure, taste and domestic life — that mattered historically in a way the critics did not anticipate.
That should make anyone cautious about the confident version of either position. The dismissal was correct on its own terms and still missed what was going on. The defence would have been wrong to claim the kits were great art. What actually happened was that the objects turned out to be interesting for a third reason nobody in the argument had raised.
A short answer
No, it is not art in the sense of authorship, and you do not need it to be. It is a craft activity with a fixed outcome, which is exactly what makes it restful, and which is the same reason people cook from recipes and play written music. The question is a real one; the answer just happens not to be embarrassing in either direction.
Frequently asked questions
Is colour by number considered art?
Not as authorship. The composition, palette and region boundaries are all decided before you begin, so you are executing rather than creating. It is best described as a craft activity, which is not a lesser category — most enjoyable making, from cooking to playing written music, is execution rather than authorship.
Can I share a finished colour-by-number picture as my own?
As a completed rendering, yes — you did the work. As an original composition, no. It is the same distinction as between a performance and the piece being performed.
Does execution count as part of art historically?
Yes, and extensively. Renaissance workshops divided composition from execution, frescoes were transferred from full-size cartoons, and printmaking editions and colour separation were skilled crafts carried out by people other than the author. The idea that one person must make every decision is a comparatively recent notion.
Where does Numbrush’s artwork come from?
It is generated procedurally at build time by an in-house tool — flat filled polygons with no antialiasing, exact rotational symmetry from rotating a single authored wedge, and hand-curated palettes — then processed into flat labelled regions. No licensed third-party image library is involved.
Try it on a real canvas
Numbrush is colour by number for adults: mandalas, rose windows and geometric pattern work, twelve colours a picture, a magnifier for the tight spots, and a wrong tap that costs you nothing. Free, offline, no ads and no account.