Pencils at the ready.
Rebecca Hendin / BuzzFeed/ Millie Marotta/ Pavillion Books/ Rosana Pense/Facebook: milliemarotta
Colour doesn't have to be your main focus – you can think of texture too.
When it comes to colouring, think about all aspects of the page. "Some people like to colour in every single tiny little detail on a page", Millie Marotta, author of Animal Kingdom and Tropical Wonderland, tells BuzzFeed Life.
"And then you've got other people who like to colour in much larger areas, and will colour in an entire section that has details drawn.
But they'll allow the line work to show through the colour – there'll be colour but there'll be texture underneath."
Catarina Gomes.