ColorPause

Research

Why grayscale?

Color is one of a handful of visual features that reliably steer attention (Wolfe & Horowitz, 2017). Take it away, and people use their phones less: in these studies, grayscale meant about 20 to 50 minutes less a day, including roughly 50 minutes less in a preregistered trial (Zimmermann & Sobolev, 2023).

Last reviewed

The short version. Go gray, and the scrolling slows down. Across these studies, people used their phones about 20 to 50 minutes less a day. ColorPause brings that idea to your Mac: the sites and apps you choose turn black and white once you hit the limits you set.

The pull of color

Color is one of a handful of visual features that reliably steer attention. In a review of what guides attention in visual search, Wolfe and Horowitz count color among four “undoubted” guiding features (2017).

Colors can also stay tied to rewards. In a lab experiment, a color that had once been paired with a reward kept grabbing people’s attention after the rewards stopped (Anderson, Laurent & Yantis, 2011).

Grayscale takes that cue away. The studies below measured what happens next: people used their phones less.

What the studies found

Turn the phone gray, and daily use drops. Every study below found less daily use, measured on phones. We checked each against its full text, except those marked “Abstract only,” where we read the published summary.

Phone studies where daily use fell
Study Who and how Screen time with grayscale What else stood out
Zimmermann & Sobolev (2023) Preregistered randomized trial; 112 postgraduate iPhone users; 2–3 weeks About 50 minutes a day less (17.6%): 233 minutes, against 283 for the control group The largest drop tied to grayscale itself. It beat the phone’s own Screen Time limits, which stayed near the control group.
Olson et al. (2023; online 2022) Randomized; 70 students; two weeks; ten tips, one of them grayscale 57 minutes a day less for a program that included grayscale, against 11 for the control group People in the program used their phones far less than people who got no program at all.
Holte & Ferraro (2023; online 2020) Abstract only 161 undergraduates, 73 of them in grayscale; 8–10 days About 38 minutes a day less Less time on social media and browsing.
Hagerty et al. (2026) Crossover trial; 51 medical students who completed it; one week of grayscale 28 minutes a day less A single week of grayscale was enough to move daily use.
Dekker & Baumgartner (2024; online 2023) 84 Android users; a normal week, then a grayscale week 20 minutes a day less (effect size d = 0.51) People felt more in control of their phone use.
Holte, Giesen & Ferraro (2023; online 2021) Abstract only 133 students Less screen time Less problematic smartphone use, too.

Why friction helps

Gray adds a little friction: the site still works, it just gets less tempting. Pauses and limits work the same way, and the studies show it.

  • A short delay, with an easy way out. The one sec app adds a brief pause before a chosen app opens. In a study of 280 users over six weeks, people abandoned 36% of their attempts to open a target app and opened target apps 57% less. In a related online experiment with 500 people, an easy dismiss option worked best (Grüning, Riedel & Lorenz-Spreen, 2023).
  • Limits people set themselves. In a randomized study of about 2,000 US adults with Android phones, self-set limits cut time on social media, browsers, and YouTube by 22 minutes a day, or 16% (Allcott, Gentzkow & Song, 2022).
  • Per-site nudges on a computer. In a study of 1,790 Chrome users, frequent per-site interventions cut time on the targeted sites by 8.0%, and that time didn’t shift to other sites (Kovacs et al., 2019). Aim the nudge at the sites that pull you in: in that study, the time saved didn't move elsewhere.

How ColorPause applies it

  • Only what you list. ColorPause grays the sites and apps on your list, not your whole screen.
  • Only after your limits. You choose the minutes or opens, the hours, and the days.
  • An easy way out. Gray sites keep working, and Show in color brings the color back for a few minutes whenever you need it.
  • On your Mac. It works window by window, for sites in Chrome and Safari and for Mac apps, on any display.

You pick the sites. You pick the limits. ColorPause takes the color away right then, and leaves the rest of your screen in color.

What ColorPause isn’t

ColorPause isn’t a medical treatment, and it isn’t meant to treat addiction, anxiety, depression, ADHD, stress, or any other condition. It isn’t a sleep aid, and it isn’t an eye-health tool: grayscale removes color, and it isn’t a blue-light filter.

References

Researched in October 2026 and last reviewed .