Phones · Samsung
Samsung Phone Black And White
If your Samsung Galaxy screen suddenly lost all color and turned black and white, a software feature like Sleep Mode, Digital Wellbeing, or Accessibility is almost always responsible.
Symptoms
- Entire One UI home screen and app icons display in monochrome grayscale
- Camera app preview and recorded media appear completely black and white
- Screen automatically loses color at the same scheduled time every evening
- Notification panel, quick settings tiles, and menus lack accent colors
- Wallpapers and photos show no color saturation across all applications
- Grayscale display persists even after rebooting the Samsung phone
Quick troubleshooting
Step 1
Turn off Sleep or Bedtime Mode in Modes and Routines
Swipe down from the top of your screen to open the Quick Panel and tap the Modes button (often shown as a moon icon). If Sleep Mode is active, turn it off. Alternatively, go to Settings > Modes and Routines > Sleep, and toggle off the feature or remove the 'Grayscale' action from the routine settings.
Step 2
Disable Grayscale in Digital Wellbeing
Navigate to Settings > Digital Wellbeing and parental controls. Tap on Bedtime mode or Wind Down (depending on your One UI version) and ensure the Grayscale toggle is switched off. If a daily schedule is enabled, adjust the hours so your screen doesn't automatically turn black and white.
Step 3
Check Accessibility Visibility Enhancements
Open Settings > Accessibility > Visibility enhancements. Tap on 'Color adjustment' and ensure the main switch is toggled off, or ensure it isn't set to Grayscale. Also inspect 'Color filter' in the same menu to make sure no monochrome or high-contrast filters are active.
Step 4
Turn Off Monochromacy in Developer Options
If you have Developer Options enabled, go to Settings > Developer options and scroll down to the Hardware Accelerated Rendering section. Tap on 'Simulate color space' and set it to 'Disabled'. If it was set to 'Monochromacy', this will immediately restore full color to your display.
Step 5
Test in Safe Mode to Rule Out Third-Party Apps
Press and hold the Power button, then tap and hold the 'Power off' icon until the 'Safe Mode' prompt appears. Tap Safe Mode to restart. If color returns while in Safe Mode, a downloaded theme, custom launcher, or battery saver app is forcing the grayscale filter.
Likely causes
- Sleep Mode or Bedtime Routine enabled within Samsung Modes and Routines
- Grayscale filter turned on inside Digital Wellbeing & Parental Controls
- Visibility Enhancements Color Adjustment or Grayscale set in Accessibility
- Simulate Color Space set to Monochromacy in Android Developer Options
- Emergency or Maximum Power Saving Mode restricting color output
- Corrupted display cache or third-party launcher software bug
What's going on
When a Samsung Galaxy phone suddenly switches to a black-and-white or grayscale display, device owners often assume the screen hardware or display panel has suffered critical damage. In reality, modern Samsung devices running One UI feature multiple software settings designed to reduce eye strain, conserve battery, or encourage better screen-time habits—many of which rely on stripping away display color.
Because these features live in separate menus—such as Modes and Routines, Digital Wellbeing, and Accessibility—it is easy for a routine schedule, an accidental button press, or a software update to activate a monochrome filter without your knowledge.
Symptoms people notice
- The display is completely monochrome, showing only shades of gray across all screens.
- Photos and videos taken with the camera look black and white on screen, though saved files may retain color when viewed elsewhere.
- The grayscale filter turns on and off automatically at set times during the evening or morning.
- High-contrast monochrome themes appear without changing your main wallpaper.
- System menus, notifications, and app drawer icons lack standard Samsung color highlights.
Likely causes
- Modes and Routines (Sleep Mode): Samsung's built-in automation tool often toggles grayscale at night to help users wind down before sleep.
- Digital Wellbeing Options: Bedtime Mode or Wind Down settings configured to remove screen color after a certain hour.
- Accessibility Settings: Visibility enhancement filters like Color Adjustment or Color Filters set to grayscale for visual comfort or contrast.
- Developer Options: The 'Simulate Color Space' developer toggle set to Monochromacy.
- Power Saving Profiles: Extreme battery saver settings configured to minimize display power draw by disabling RGB color output.
Quick checks first
Before digging deep into system menus, check if a quick toggle is driving the change:
- Swipe down the Quick Panel: Look for the Modes tile (or Bedtime mode). Tap it to turn off any active routines.
- Check Battery Saver: Tap the Power Saving tile in the Quick Panel to see if an ultra power-conserving mode is altering your theme.
- Restart the Device: A simple reboot often clears temporary display overlay glitches caused by third-party apps. If you are experiencing other screen issues like glitches or touch non-responsiveness, check our general /problems archive.
When it's a real repair
In roughly 99% of cases, a black-and-white screen on a Samsung Galaxy phone is purely software-driven. However, if you have verified that every software setting, routine, accessibility option, and developer switch is off—and a factory reset fails to bring back color—you may be dealing with a rare hardware failure.
Hardware-related color loss usually manifests as severe color distortion, green or pink vertical lines, or localized flickering rather than a perfectly balanced, sharp grayscale image. If the display was recently exposed to water or dropped, damaged GPU lines or a failing OLED driver chip could be responsible. Explore our detailed hardware repair /guides to evaluate screen replacement options.
DIY vs professional repair
Because this issue is almost always a configuration setting, you do not need to open your phone, break out specialized tools, or purchase replacement parts. You can resolve this issue yourself at home in just a few minutes by following software troubleshooting steps.
If you've completed all setting audits and even performed a full system restore without success, the OLED screen panel or motherboard display connector may require hardware repair. If you aren't comfortable taking apart your phone, consulting an offsite repair specialist via LML Experts or taking the device to a qualified technician is your best path forward.
Next steps
Start by walking through the ordered steps in the troubleshooting tab above. Check Modes and Routines, inspect Digital Wellbeing, and verify Accessibility visibility settings.
If the issue turned out to be software related, consider reviewing our community /reviews or browsing our comprehensive library of step-by-step DIY smartphone /guides to keep your Samsung Galaxy running in peak condition.
Next steps
Try the DIY guide if you're comfortable opening the device. Still stuck? Browse related problems for similar symptoms.
