How to short-cut iPhone screen red – for night vision

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Colour Tint is a feature of iOS 10 buried so deep in the settings it was almost missed. Its quite different from NightShift mode as it acts like a red filter over the entire screen, turning all the light red.

NightShift on the other hand, only removes some of the blue light, wavelengths, but not all.

Colour tint set to red not only removes all blue wavelengths so protects your melatonin rhythm but can also protect your ‘night vision’ as red light is harder to see than other wavelengths, so your eyes remain dilated – in night vision mode, and better able to re-adjust to the dark afterwards. This is perfect if you have to look at your phone in the middle of the night eg. to check the time.

Here is how a how to video-

or here’s the step by step-

Go to Settings –> General –> Accessibility –> Display Accommodations.

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Next, enable “Color Filters” with the switch at the top of the screen, then select “Color Tint” as your filter. From here, scroll down just a little further, then use the Intensity and Hue sliders to make the red effect more prominent. Both should be in the far right position for maximum redness.

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Next Set up a short cut so you can triple-click the home button to turn the screen red

Go to Settings –> General –> Accessibility, then scroll all the way to the bottom and select “Accessibility Shortcut.” Choose the “Color Filters” option from the list, and you’re done. Now every time you triple-click the Home button (or Side button on the iPhone X), it’ll switch between normal screen and red tint.

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Now click three times and ENJOY!

How to turn on ‘Night Shift’ on your iPhone

Exposure to blue light is important during the day. Conversely it is not something we have evolved with after dark (apart from moon and star light) and it adversely effects our biological rhythms.

Smart phones, tablets and computers expose us to a high level of blue light this tricks our brains into thinking it is still day time when exposed after dark.

There is evidence for increased risk of heart attack, cancer, Alzheimer’s and obesity.

Fortunately there is software available which can mimic the day and night warming up the tones of the screen to firelight colours after dark.

These include F.lux for computers, Twilight for android and Night Shift for iPhones, and iPads.

There will be more detailed information about this on the rest of the site. For now please turn on your ‘Night Shift’.

  1. Select Settings
  2. Select Display and Brightness
  3. Slide across to turn on Night Shift
  4.  Click on the Custom Schedule times to reveal the Sunset to Sunrise button.
  5.  Select Sunset to Sunrise to sync with the day and night.nightshift2
  6. Slide colour temperature to the maximum ‘More Warm’


That’s it.

This is currently available with iOS 9.3. Some earlier models are not able to update to this software.