HexScreen / Yellow Screen
#FFFF00 · Free · No adsYellow screen, warm and bright.
Yellow combines red and green subpixels and works well for tests and warm accent light.
Tip: F starts fullscreen, Esc exits.
How it works
Pick a color
Choose a preset or set any shade with the color picker.
Start fullscreen
Click the preview or press F. The color fills your entire screen.
Use it and exit
Switch colors with ← →, return with Esc or a double-click.
What you can use it for
Mixed color test
Check red and green at the same time.
Warm light
Cozy lighting for photos.
Attention
A highly visible surface for notices.
Isolate channels
Missing blue goes unnoticed on yellow, but red or green faults do not.
Download Yellow Screen as an image
Created right in your browser, in full resolution and without a watermark.
Good to know
Yellow as a display test
A yellow screen switches off the blue subpixels. This lets you check specifically whether red or green pixels are faulty.
Frequently asked questions
How do I start fullscreen mode?
Click the preview, the “Start fullscreen” button, or press the F key. Press Esc or double-click to exit.
Does it work on phones and tablets?
Yes. Android and most desktop browsers use true fullscreen. On iPhone the color fills the browser window; add the page to your home screen for true fullscreen.
Can I change the color in fullscreen?
Yes. Move the mouse or tap the screen to show the color bar, or use the arrow keys.
Is it free?
Yes, all tools and image downloads are free, with no sign-up and no ads.
Is a bright screen bad for my eyes?
Not with normal use. Lower the brightness for longer sessions and take regular breaks.