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Choose what feels comfortable.
Dims website content, not your screen’s hardware brightness. Controls stay readable.
Chosen times also serve as the fallback when sunrise/sunset is unavailable.
Location is optional. Approximate coordinates stay in this browser; they are not sent to our servers. Update them when you travel.
Evening light can delay circadian timing and suppress melatonin. Warmer, dimmer viewing may reduce this stimulus, but timing, duration, brightness and your display matter. These website modes have not been tested for sleep benefits.
Red monochrome removes blue and green from rendered site colors where supported. It cannot guarantee zero blue light emitted by your display, and does not change browser bars, other apps or room lighting. Use device night settings and lower screen brightness too. Turning the screen off eliminates its light.
Grayscale removes color cues that can make screens more visually compelling. Research suggests it can help reduce screen time and support more intentional screen use. A randomized field experiment found reduced smartphone screen time; a separate one-week study found about 20 fewer minutes per day and improved perceived control over use. These studies used whole-phone grayscale, so the same benefits are not established for this website alone. Grayscale is a support for managing problematic screen use, not a proven treatment for screen addiction.
Grayscale alone does not remove blue light. In night modes, monochrome stays warm or red rather than turning white.
Keep text comfortable to read. Dimming is optional; use Reset whenever a view is difficult.
Evening screen study · Light spectrum study · Grayscale randomized study · Grayscale & digital wellbeing study
Start with the settings already on your device. Use a comfortable text size, reduce actual screen brightness, and choose a warm or red reading view. Set a schedule that fits your bedtime; you can pause it whenever you need accurate colors.
Open Settings → Display & Brightness → Night Shift. Choose a schedule and move the temperature toward More Warm. For a red tint, go to Accessibility → Display & Text Size → Color Filters → Color Tint; adjust hue toward red and intensity to suit. Reduce White Point can soften bright areas.
Night Shift and some color filters can switch one another off. Check which effect is active after changing them. Return to the same menu to turn an effect off.
On Pixel, open Settings → Display & touch → Night Light. Adjust its intensity and choose a custom or sunset-to-sunrise schedule. For grayscale, open Digital Wellbeing & parental controls → Bedtime mode → Customize → Screen options at bedtime → Grayscale. You can also use Do Not Disturb at bedtime.
Names vary by phone: search Settings for “Night Light,” “Eye comfort,” or “Bedtime.” Pause the setting in Quick Settings or turn its schedule off in the same menu.
Open Settings → System → Display → Night light. Adjust Strength and enable Schedule night light with chosen hours or sunset to sunrise. For grayscale, open Settings → Accessibility → Color filters. Toggle each off from the same menu when needed.
Lower actual display brightness separately; external monitors may require their own buttons. Some display drivers do not support Night light.
Microsoft: brightness & Night light · Microsoft: color filters
Open Apple menu → System Settings → Displays → Night Shift. Set a schedule and warmer temperature. For a red tint or grayscale, open Accessibility → Display → Color Filters, then choose Color Tint or Grayscale.
Night Shift may turn off other color filters, except grayscale. Check the active effect. Use the same menus to turn settings off, and adjust screen or monitor brightness separately.
f.lux offers scheduled color adjustment on Windows and Mac. Set your approximate city and usual wake time, then adjust evening colors. Its Color Effects → Darkroom option gives a red-and-black view; use Disable for an hour when you need ordinary colors. Twilight offers adjustable filtering and schedules on Android. Choose Sun or custom Filter times, adjust color temperature and intensity while keeping text readable, and use Pause/Resume for an override. Start with built-in settings; if you use an app, follow its official setup and pause controls. Avoid overlapping filters that unexpectedly replace each other. Neither is a certified zero-blue solution.
Use a reflective e-ink reader with its front light completely off, or read a printed page. Illuminate it with a dim amber or red lamp whose measured spectrum shows no detectable blue in the stated test range. Turn off other screens and bright indicator lights. Keep enough light and text contrast to read comfortably.
E-ink reflects room light, so an unlit screen alone does not make the whole setup blue-light-free. A warm front-light setting is different from switching the front light off. How reflective E Ink works.
A red-looking screen or a low color-temperature setting does not establish zero blue output. Software can reduce blue in rendered content, but the display and surrounding light still determine exposure. Verifying a blue-light-free setup requires spectral measurement, a defined wavelength range and a stated detection limit; a screenshot or ordinary phone camera cannot verify it. These options support comfortable night reading, without a guarantee of better sleep.
Device instructions checked November 2026. Menus and availability may vary by model and software version.
