Full Screen Color Viewer
View any hex color fullscreen with shortcuts, timer, and dead pixel test.
Fullscreen Color Viewer
View colors in fullscreen mode for screen tests, presentations, and more
#000000
Color Palette
Default Colors (with shortcuts)
Material Design Colors
Instructions
Keyboard Shortcuts
Press 1-9 keys to quickly switch between default colors. Press Enter to go fullscreen, and Esc to exit.
Dead Pixel Test
Enable this option to automatically cycle through black, white, and primary colors. Perfect for identifying dead or stuck pixels on your display.
Timer Function
Set a timer to automatically exit fullscreen mode after a specified duration. Useful for presentations or testing.
Use Cases
Screen Testing
Check for dead pixels, color accuracy, and screen uniformity by viewing solid colors at full screen.
Presentations
Use as a background during presentations or video recordings. The timer function helps for timed segments.
Color Sampling
Preview and experiment with colors for design projects or verify brand colors on different screens.
How it works
What a full screen color viewer does
A full screen color viewer floods the display with one solid hex color so you can judge a swatch, calibrate a monitor, or hunt dead pixels. This tool runs in your browser with a HEX picker, Default and Material palettes, keyboard shortcuts 1-9, optional Timer, Pixel Test cycling, and the browser Fullscreen API (Maximize or Enter).
How to use this viewer
- Pick a color with the HEX picker, type a HEX Code, or click a palette swatch.
- Press keys 1-9 for Default palette shortcuts, or enable Timer / Pixel Test.
- Click Maximize (or press Enter) to enter fullscreen.
- Exit fullscreen with Esc when you are done.
Default palette shortcuts
| Key | Color | HEX |
|---|---|---|
| 1 | Black | #000000 |
| 2 | White | #FFFFFF |
| 3 | Red | #FF0000 |
| 4 | Green | #00FF00 |
| 5 | Blue | #0000FF |
| 6 | Gray | #808080 |
| 7 | Yellow | #FFFF00 |
| 8 | Cyan | #00FFFF |
| 9 | Magenta | #FF00FF |
Pixel Test cycles black, white, red, green, and blue every 2 seconds so stuck pixels stand out against a changing field.
Building a product UI color system?
Swatch checks are one step; design systems need broader UX work. See UI/UX design services.
Core capabilities
What this full screen color viewer covers
Hex picker, default color shortcuts 1-9, timer, recent colors, and dead pixel test.
Hex and picker colors
Choose from defaults or any custom hex color with the color picker.
Dead pixel test
Cycle solid colors fullscreen to help spot dead or stuck pixels.
Auto exit timer
Optionally leave fullscreen after a set duration.
Recent colors
Jump back to colors you used earlier in the session.
Shortcuts 1-9
Keys 1-9 map to Black, White, Red, Green, Blue, Gray, Yellow, Cyan, Magenta. Enter opens fullscreen.
Copy hex
Copy the current hex code to the clipboard.
Step-by-step flow
How to Use
Simple 3-step process
Step 1
Select a default color, use the color picker, or enter a hex value.
Step 2
Click Enter Fullscreen or press Enter to fill the screen with that color.
Step 3
Press Esc to exit, or use the auto-exit timer and dead pixel test when needed.
Frequently asked questions
Frequently Asked Questions
Everything you need to know about this tool and how it works.
See Full FAQNumber keys match the defaultColors list in the tool: 1: Black (#000000) 2: White (#FFFFFF) 3: Red (#FF0000) 4: Green (#00FF00) 5: Blue (#0000FF) 6: Gray (#808080) 7: Yellow (#FFFF00) 8: Cyan (#00FFFF) 9: Magenta (#FF00FF) Enter: Enter fullscreen Esc: Exit fullscreen
Dead pixel test mode cycles solid colors fullscreen so stuck or dead pixels stand out against a uniform background. Exit with Esc when you are done.
Yes. Use the color picker or enter a hex value, then open fullscreen. Recent colors keep session history for quick reselect.
Yes. The timer and fullscreen viewer run in your browser after the page loads. No signup is required.
It helps with dead pixel checks, comparing color on a real display, and reviewing hex backgrounds without browser chrome.
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