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How It Works

Plain explanations of the machinery behind color-by-number and mosaic conversion, for readers who want to know what the tool is doing.

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Articles tagged How It Works

color-by-number14 min read

The Same Mark, Two Different Instructions

Symbol stands for a color

Red
Amber
Green
Blue
Violet
Five marks, five pencils. Nothing is shaded — each cell is filled flat.

Symbol stands for a shade

Barely there
Very light
Light
Medium
Dark
Solid
Six marks, one pencil, pressed harder each step. This is what Mosaci exports.

Both are symbol coloring pages, and a page never tells you which kind it is — the legend does. Read it before the first cell, not after.

Sep 18, 2026·14 min read

What Is Color by Symbol? A Beginner's Guide

On a symbol page the code is a shape rather than a digit — and that shape can mean a color or a shade. The legend is the only thing that tells you which.

Mosaci Studio TeamRead guide
mosaic17 min read

The Same Subject at Three Grid Sizes

16 columns10.69 mm cellsCenter reduced to a two-cell blob; the leaf is two cells and reads as noise.
32 columns5.34 mm cellsCenter holds at four cells across. Comfortable to color.
64 columns2.67 mm cellsEvery detail survives — and there are 4,096 cells to fill.

Grid size is not a quality setting. Each of these is the correct answer for a different reader, a different subject and a different page.

Sep 18, 2026·17 min read

Mystery Mosaic Grid Size: How to Choose Cell Size and Columns

Grid size looks like a taste setting and behaves like an engineering one. The grid box is 171 mm wide, that width divides by your column count, and the result either fits the pencil in the reader's hand or it does not.

Mosaci Studio TeamRead guide
color-by-number17 min read

How a Mystery Page Reveals Itself

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Coded pageMarks only — no subject
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In progressSomething is forming
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RevealedThe hidden image

The same page at three points. Nothing is added between them — the picture was always in the code.

Sep 18, 2026·17 min read

What Is Mystery Coloring? A Beginner's Guide

On a mystery page you are given a code and no picture. The image only appears as you work through it — and everything else about the format follows from that one inversion.

Mosaci Studio TeamRead guide
mosaic6 min read
1
Photo
2
Simplify
3
Cells
4
Colors
5
Result
Sep 3, 2026·6 min read

How Does Mosaic Coloring Work?

Mosaic coloring lays a tile grid over a simplified image and colors each cell to match. Here's exactly how that process works.

Mosaci Studio TeamRead guide
color-by-number6 min read
1
Image
2
Simplify
3
Regions
4
Numbers
5
Color Key
6
Result
Sep 3, 2026·6 min read

How Does Color by Number Work? A Step-by-Step Explanation

Color by number works by dividing an image into numbered regions, each tied to one color in a key. Here's exactly how that process works, step by step.

Mosaci Studio TeamRead guide

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