(CNN)The coronavirus crisis has many people glued to their smartphone screens for more and more hours each day, even if they don't want to be.
In fact, sheltering in place can lead to a nearly 60% increase in the amount of content people consume across all devices, according to a March report from Nielsen.
Even before coronavirus lockdowns and increased time at home leading to more screen time, many people had reported feeling addicted to their smartphones.
More than a quarter of parents and 36% of teens wake up to check their phones at least once at night, and more than half of teens and parents said they feel distracted by their mobile device at least once a day, according to a 2019 report from Common Sense Media.
American teens spent an average of seven hours and 22 minutes on screens each day in 2019 — not including screens used for school work. And that was before the pandemic pushed people's social lives onto Zoom video chats.
Designed to grab you
There's a reason why your phone is hard to put down: Those bright red notifications on your phone are designed to capture your attention. Science has revealed that human brains are triggered by things that are bright and shiny. That's why one of the easiest hacks for combating cell phone overload is to zap the color out of your phone by putting it in grayscale mode.
"Research shows that we as humans are very visually based. We like to engage with visual things, including smartphone screens," said Daria Kuss, an associate professor of psychology at the UK's Nottingham Trent University. Kuss specializes in smartphone use and internet addiction.
"Once you are really engaging with a black and white screen, the likelihood of you spending a lot of time with that screen is certainly reduced."
Grayscale mode is an accessibility setting in most smartphones that was created to help software developers design products for visually impaired users. But for other users, it also has the effect of making the screen less fun and engaging.
College students who put their phones in grayscale spent significantly less time browsing the internet and on social media apps, and their average daily screen time was reduced by nearly 40 minutes, according to a recent study by the University of North Dakota.
Grayscale helps subvert the tech designers' goal of getting you to spend more time on your device, said Alex J. Holte, lead author and a doctoral student in the University of Dakota's department of psychology.
"The individuals who create these applications want us to use them often," Holte told CNN. "Each application icon is very bright and they are very attractive colors for our brains' attentional center."
It's one explanation behind why Instagram and Google have redesigned their logos in the last several years to have bolder, warmer colors — vivid hues lead to more taps and clicks.
Grayscale is boring
Grayscale is simply less gratifying.
"Phone use becomes habitual. We associate phone use as being rewarding, so if you make it less rewarding, it kind of breaks that circular chain of events," Holte explained. "So then if you would compare, 'Oh am I going to go on my phone that's in black and white or am I going to go outside?' — it becomes more of an even battlefield in terms of choosing which option would be more gratifying."
In a follow-up study, Holte found that students using grayscale also felt less compelled to check their phone notifications. But he noted that phone use differs greatly from user to user.