Yellow Screen
Yellow lights the red and green sub-pixels together at full power, which makes it one of the brightest colours a display can produce — noticeably brighter to the eye than pure red or pure blue.
What people use the yellow screen for
A warm, high-output light source
Because yellow uses two sub-pixels at full strength it throws more usable light than most colours. Handy as a warm fill for video calls or a warm bounce in photography.
Maximum-visibility display
Yellow on black is the highest-contrast pairing the eye handles well, which is why it is used for hazard signage. A yellow screen makes a device easy to spot across a room or in a dim space.
Warm-toned backdrop
A flat yellow field behind a product or a piece of art gives a bright, cheerful backdrop without post-processing.
How to use the yellow screen
- 1Open the yellow screen — it fills the page immediately, no button needed.
- 2Press F or use the fullscreen button to go edge to edge with no browser chrome.
- 3Use the brightness slider to dial the output up as a light source or down for a dark room.
- 4Move the mouse or tap once to bring the controls back; they fade out on their own after a few seconds.
- 5Press a number key or use the colour strip to jump straight to another colour.
Frequently asked questions
How do I make the yellow screen fill my whole display?+
Press F (or click the fullscreen button) to enter true browser fullscreen, which hides the tab bar, address bar and taskbar. Press Escape to leave. On mobile, tapping the screen hides the controls; add the page to your home screen for a fullscreen launch every time.
What is the exact yellow colour used here?+
#FFFF00. You can copy it from the control bar, or open the colour picker to dial in any other value and keep it in the URL so the exact shade is bookmarkable.
Does this work on phones and tablets?+
Yes. It works in any modern browser on iOS, Android, Windows, macOS, Linux and ChromeOS. Nothing is installed and nothing needs an account.
Is it free, and are you tracking me?+
Free, with no sign-up. Every tool here runs entirely in your browser — no colour choices, screenshots or usage details are sent anywhere.