Colour by number books let you reveal a picture one section at a time. Match each number to the shade in the colour key, then follow the guides to build the illustration. Mystery colouring adds an element of surprise, as the subject may not become clear until the colours begin to fill the page. This guided approach lets you focus on colouring and watching the design develop without having to plan the entire palette yourself. When choosing a book, consider the size of the spaces, how easy the numbers are to read, and the range of colours needed. Some illustrations feature broad areas, while others invite more detailed work across many smaller sections. You can work through one colour at a time or complete an area before moving to the next, whichever feels more satisfying. Check that the paper suits your coloured pencils or markers to help protect the pages underneath. Want to alternate between guided pictures and choosing your own palette? Browse our colouring books collection. Our creative hobbies selection also offers other projects you can enjoy bringing to life step by step.