- Display Test
- Click Counter
- Sequence Memory Test
- PPI Calculator (Retina Display)
- Aspect Ratio Calculator
- Draw a Perfect Circle
- Mouse Drift Test
- Chimp Test
- Dead Pixel Tester
- Touch Screen Test
- Reaction Time Test
- Keyboard Latency Test
- Kohi Click Test
- Mouse Accuracy Test
- Number Memory Test
- Color Blind Test
- Frame Rate Test (FPS Test)
- Keyboard Double-Click Test
Free Screen Color Test Online
Use this screen color test to fill your display with one solid color at a time. A solid background makes faulty pixels, uneven spots, and color problems easy to see. It works for a new monitor, a used laptop, a TV, or a screen you suspect has a problem.
How to Use the Screen Color Test
- Pick a color. Click any swatch below the preview. The color name and its HEX code (for example, Red, #FF0000) appear above the preview.
- Go full screen. Click the Full screen button, or click the preview itself. The color then covers your whole display.
- Look closely. Check every part of the screen, including the corners and edges.
- Switch colors. Move through the colors yourself, or press Auto play and let the tool change colors for you.
What the Tool Offers
- 24 preset colors. The set includes black, white, three shades of gray, red, green, blue, yellow, cyan, magenta, orange, purple, pink, brown, navy, teal, maroon, olive, gold, coral, and more.
- Full screen mode. The color fills the entire display, so there are no menus or borders to distract you.
- Auto play. The tool cycles through colors on its own. Use the speed menu to set how often it changes (the default shown is every 2 seconds).
- Custom color. Use the color picker or type a HEX code, such as #FF0000, to test any shade you want.
What to Look For
Every pixel should show the same solid color. As the tool says, dots that stay dark or change color are faulty.
- Dark dots on a bright color. A pixel that stays dark on white, red, green, or blue may not be lighting up.
- Dots of the wrong color. A tiny spot that stays one color while the rest of the screen changes is a sign of a stuck pixel.
- Patches or tints. A section that looks different from the rest of the screen may point to a display problem.
Why Test with More Than One Color
A faulty pixel can hide on some colors and stand out on others. A bright dot is easy to spot on black but may vanish on white. Running through several colors gives you a much more reliable check than looking at a single one.
When to Use This Tool
- Buying a monitor, laptop, or TV. Test it before the return window closes.
- Buying second-hand. Check the screen before you pay.
- After a drop or impact. See if the display was damaged.
- Setting up a new display. Make sure the screen looks clean before you start using it.
- Photo or design work. Use the custom color option to look at a specific HEX shade on your screen.
Tips for Better Results
- Go full screen so nothing else is on the display.
- Test in a dim room. Dark and bright dots are easier to see.
- Clean the screen first. Dust and smudges can look like faulty pixels.
- Use Auto play, then pause on any color where something looks wrong and inspect it closely.
- Check the corners and edges, not just the middle.
Frequently Asked Questions
Can this tool fix a dead or stuck pixel?
No. It only helps you find and check problems. It does not repair a display.
What should I do if I find a faulty pixel?
Note which colors show the problem and where on the screen it appears. If the device is new or under warranty, contact the seller or manufacturer with that information.
Is a speck of dust the same as a faulty pixel?
No. Dust or dirt sits on top of the screen and can often be wiped away. A faulty pixel is part of the display and stays in the same spot.
How do I test one exact shade?
Type its HEX code into the custom color field, or choose it with the color picker. The preview updates to that color.
How do I stop full screen mode?
Use your browser’s usual way to exit full screen, such as pressing the Esc key.