Dark mode is a display setting for user interfaces, such as a smartphone or laptop.

It means that, instead of the default dark text showing up against a light screen (known as ‘light mode’), a light colour text (white or grey) is presented against a dark or black screen.

Light mode, however, is the default setting for most phones and apps.

Dark mode can also be known as:

• black mode
• dark theme
• night mode
• light-on-dark

The idea behind dark mode is that it reduces the light emitted by device screens while maintaining the minimum colour contrast ratios required for readability.

Both iPhones and Android handsets offer system-wide dark modes. However, you will still need to set up dark mode on some individual apps.

The science behind dark mode is still a little shady, with lots of conflicting views and evidence as to its benefits. Some experts say it’s easier and healthier to read text against a dark background as it reduces eye strain, while other studies arrive at the opposite conclusion.

There’s also a debate about whether dark mode can make your smartphone battery last longer.

Many mobile users simply think dark mode looks more slick. And some apps, most noticeably Spotify, have always leaned to the shadier side of the colour spectrum.

What are the advantages of dark mode?

• It’s better for low-light settings – so you can use it in bed without keeping your partner awake or in the cinema without disturbing other people
• There will be less ‘blue light’ emitted from your phone – which can keep you awake if you use your phone before you go to bed
• Can use less energy so your phone battery will last longer
• Can potentially reduce eye strain and dry eyes in low-light conditions
• Some experts say dark mode can help people with light sensitivity or visual impairment.

What are the disadvantages of dark mode?