Colored Light: Screen Colors for Reading and Signaling

Choose a screen color for the task: white for a nearby label, amber for a reading preference, or a contrasting color for a message. Adjust your device’s hardware brightness to suit the setting. This screen flashlight changes displayed content; it offers no treatment for sleep, mood, or concentration.

White Light for Nearby Tasks

Place a white screen near the page or object and use the lowest brightness that lets you see the details. Use another light if the screen cannot illuminate enough of the task.

A strong tint can make colored markings harder to distinguish. Use suitable lighting to compare colors, and do not use a screen color to assess an injury.

Warm or Amber Light for Reading

Try a warm or amber screen if you prefer it for reading. Position it to reduce glare and reflections. Choose your settings by the page’s readability and your comfort, without expecting a sleep benefit.

See our screen vs. LED comparison for the lighting tradeoffs.

Dim Red Light in Darkness

For a short task while stargazing, try a dim red screen aimed at your printed note or equipment. Keep it away from other observers and follow the site’s lighting rules.

Red does not guarantee unchanged night vision. A bright display can disrupt your view, and red light can obscure colored details. Our red light guide covers settings and limits. Use a torch or headlamp if you need to see a path or hazards.

Colors and Messages for Signaling

Choose a screen color that contrasts with the surroundings. For a specific message, use readable text or a signal that you and the viewer have agreed on. Check the view from their position if you can. Distance, ambient light, and viewing angle limit visibility.

For custom Morse, open the SOS panel, select Custom Morse Code, enter text, choose a speed, and press START. Press STOP to end the signal. Typing does not start flashing.

SOS, Morse, and strobe modes expose viewers to flashing light, which can trigger seizures in people with photosensitive epilepsy. Read the strobe safety guide, avoid exposing anyone who may be photosensitive, and get consent from others nearby. No speed setting guarantees safety.

Solid Colors for Display Checks

Try solid colors to look for uneven areas or marks on your screen. Check whether a mark sits on the surface before drawing conclusions. You cannot measure color accuracy or diagnose a panel with this flashlight. Use display-testing tools or technical support for those tasks.

Set a Color in the App

1. Open the online flashlight and tap the power button.
2. Open the controls and choose a preset or custom color.
3. Adjust hardware brightness in your device settings.
4. Position the screen and try fullscreen if your browser supports it.
5. Turn the light off after use.

Color and Battery Use

OLED and AMOLED pixels emit light, so screen content affects display power use. On LCD displays, the backlight affects consumption. Device activity and brightness matter with either type. Avoid assuming one color gives a fixed saving; reduce lighting time and use the lowest workable brightness. See our battery conservation guide.