Accessible colouring: switch, high-contrast and thick-line modes

Every colour-online page on Colouring Nest has five modes for people who can’t easily tap small shapes or see thin lines: switch scanning, high contrast, thick lines, bigger colour buttons and dwell to select. They were written with occupational therapists, carers and teachers of children and adults with low vision or motor impairments in mind. Open any picture, then choose Accessible colouring under it.

Try it on a bold, easy picture

These have few, large shapes, which suit switch and dwell users best.

Bold and Easy Mandala #1

Bold and Easy Flower #4

Bold and Easy Pattern Tiles #3

Bold and Easy Stars #1

Easy Mandala #1

Easy Mandala #51

The five modes

Switch mode

For people who use one or two switches, or a keyboard, instead of touch. Turn it on and large Back, Next and Select buttons appear beside the picture. Next (or the Space key) moves a thick blue outline to the next shape, top to bottom and left to right. Select (or Enter) fills that shape. The first stop is “Colours”: select it and Next walks through the colours, Select picks one and takes you back to the shapes. The keys 1 and 2 do the same as Space and Enter, and Shift+Space or Backspace goes back one step. Tab always moves on to the rest of the page, so nobody gets stuck in the picture.

High contrast

For low vision and for screens in bright rooms. The picture turns black with bright yellow lines, and the colours you add stand out against it. It changes only the screen: printing and the downloaded picture stay black lines on white paper.

Thick lines

For people who find thin lines hard to see or to stay inside. Every line is drawn twice as thick. The tiniest shapes, the ones that need the most precise aim, become part of the lines, so the picture has fewer, bigger spaces to colour.

Bigger colours

For less steady hands and pointers. The colour buttons grow from 44 to 64 pixels, comfortably above the 44 pixel target size that WCAG’s enhanced level asks for.

Dwell to select

For eye-gaze cameras, head pointers and anyone who finds clicking tiring. Off unless you turn it on. Rest the pointer on a shape or a colour and it is chosen after the time you set: 0.8, 1.2, 1.6 or 2.5 seconds. A dashed outline shows what is about to be chosen; move away to cancel. The same shape is never filled twice in a row until the pointer leaves it. If the person already uses the dwell click of Windows eye control or a communication device, leave this off so clicks don’t happen twice.

Settings are saved on the device, so a child’s tablet opens in their modes every time. You can combine them: thick lines with high contrast, or switch mode with bigger colours.

Setting up for a session

Start with a bold and easy page or an easy mandala: fewer shapes means fewer switch presses.
Turn on the modes before handing over the device, then open the picture.
For two switches, set them to Space (next) and Enter (select). For one switch, use the device’s own scanning (iPad Switch Control or Android Switch Access) with the big Next and Select buttons.
Choose the dwell time with the person, starting slow (1.6 or 2.5 seconds) and shortening it as they get comfortable.
Undo is always there, and the coloring is saved on the device if the session ends early.

Printables for low vision and less steady hands

For paper, the bold and easy pages have extra-thick outlines and a few large shapes, the large-print word searches use big letters on small grids, and the seniors page gathers both for adults. Teachers of students with low vision often ask for “thick black outlines” and less clutter, as Paths to Literacy describes; those pages start there. Print them with “Fit to page” and economy mode off so the lines come out fully black.

The guidance behind it

The studio already works with a keyboard alone (WCAG 2.2 success criterion 2.1.1) and never traps focus (2.1.2). Switch mode follows the two-switch “move to next item, select item” pattern used by iOS Switch Control and Android Switch Access. The scan buttons are 64 pixels tall and the bigger colours 64 pixels wide, above the 44 pixel enhanced target size (2.5.5). Dwell to select is off by default and its time can be changed, as timing guidance asks (2.2.1). The scan and dwell outlines are thick and high-contrast against the picture (1.4.11).

No new tracking was added for any of this. The settings live only in the browser’s local storage on the device.

Questions

Do the settings follow the person to other devices?

No. They are saved in this browser on this device only, so a shared classroom tablet keeps its own settings. Nothing is sent to us and there is no account.

Which switch interface works best?

On a computer or Chromebook, a USB or Bluetooth switch interface that sends Space and Enter (or 1 and 2) works with switch mode directly. On iPad and Android, the built-in Switch Control and Switch Access can also move through the big Back, Next and Select buttons.

Is colouring a therapy?

We don’t make that claim. These modes are about access: making the picture easier to see and to reach. An occupational therapist can advise on goals and on the right equipment for each person.