Blue Screen
A free blue screen: pure, light, dark or chroma blue, or any blue you pick. Go full screen in one click.
Press F for full screen · ← → to change the blue · Esc to exit
Pick a setup
Customize your blue screen
Shade
Brightness
Download
Saved at full brightness
Timer and effects
Get a free blue screen in one click
The blue screen on Black Screen Online is a free tool that fills your whole screen with blue, with no sign-up. Press Start blue screen to open Pure blue (#0000FF) in full screen. People looking for light blue sometimes get a deep, hard-to-use color instead, so I made Light blue and Dark blue separate setups. Blue or green? helps when clothing blends into a video backdrop. Did Windows crash to blue? See what the blue screen of death means.
Updated October 13, 2026
6 blues
Pure blue to navy
5 setups
One click for each job
7680 px
Your own download size, on each side
Free
No install, no sign-up
How do you use the blue screen?
Open a blank blue screen in three steps. Pure blue is the starting shade, but you can choose another.
Under Pick a setup, choose Light blue, Dark blue or another option. Skip this for pure blue.
Press Start blue screen. The color fills the display in full screen.
Press Esc or select Exit to return to the page.
Escback to the page
Keyboard and touch controls
- FOn a desktop or laptop, open full screen with F or by double-clicking the preview. On a phone, tap the preview twice.
- ← →Use the left and right arrows for different shades, and the up and down arrows to change the brightness in 5% steps. Your device still has its own brightness control.
- LockThe controls fade when you stop moving. On a phone, Lock blocks accidental taps; press and hold to unlock.
Your settings are remembered
The page can restore your previous settings on later visits. Choose Reset to default whenever you want the original setup again.
What can you use a blue screen for? Five setups
A blue screen works as a plain blue background, a soft blue light, a backdrop for a small video shot and a check for broken dots. I chose five setups for these jobs, so you can find the right blue without changing several controls. Setups for: Computer / Phone or tablet shows the cards for your device, and you can switch views if needed. Every card has a ? tip, and an edited card shows Changed.
| Setup | Available on | What it shows |
|---|---|---|
| Blue screen | Computer, phone, tablet | Pure blue #0000FF that stays on |
| Light blue | Computer, phone, tablet | Pale blue #ADD8E6 at full tool brightness |
| Dark blue | Computer, phone, tablet | Deep blue #00008B for a darker display |
| Chroma key blue | Computer, phone, tablet | Blue #0047BB for a replaceable video backdrop |
| Check blue pixels | Computer | Pure blue with thin lines for visual inspection |
Blue screen
Computer, phone, tabletBest for: a background or a blue light
Blue screen: a plain background and a blue light
Choose Blue screen for a solid color behind a small object, a simple signal, or a quick display check. It also makes a cheap blue light. Set a laptop or TV behind a photo subject, or fill a room with a cool glow for a party, then lower Brightness if it is too strong. For a flashing police-light look in a home video, open Flash and pulse and pick Flash. On a projector, it turns a white wall into a blue backdrop. Press Esc when you are done.
Light blue
Computer, phone, tabletBest for: a soft, pale background
Light blue screen: a soft, pale background
Choose Light blue for a light blue screen when pure blue looks too dark for a slide, phone wallpaper, or close-up photo. If the pale color seems too bright, lower Brightness in the Light tab. Sky blue is another choice, close to baby blue. Compare the two in your room rather than guessing from the names. Want plain, bright light with no color at all? Use the white screen instead.
Dark blue
Computer, phone, tabletBest for: a dim room
Dark blue screen: a deep, dimmer blue
Dark blue gives you a dark blue screen, close to navy. It stays visible in a dim room and lights up the room far less than pure blue. Tool brightness goes down to 5%, but your device sets how much light the screen produces.
A soft, pale blue at full brightness. It stays on.
Which blue screen color code should you choose?
Pure blue is #0000FF, or RGB (0, 0, 255). There is no single "blue screen color": other shades use different values. Light blue includes more red and green, so it looks paler.
Under Open settings → Light, choose from six blues:
Pure blue
#0000FF
RGB 0, 0, 255 · A solid blue field and blue pixel checks
Light blue
#ADD8E6
RGB 173, 216, 230 · Pale backgrounds
Sky blue
#87CEEB
RGB 135, 206, 235 · A brighter, airy blue, close to baby blue
Royal blue
#4169E1
RGB 65, 105, 225 · A medium blue with more visible light
Chroma blue
#0047BB
RGB 0, 71, 187 · Removing a blue backdrop from footage
Dark blue
#00008B
RGB 0, 0, 139 · Deep blue and dim displays
For navy blue, enter #000080 under Custom. Use Copy this color code when you need the shade in a design or slide. The same code can look a little different from one screen to the next, so check it on the screen you will use. The tool calls #0047BB Chroma blue. It is our backdrop choice, not a required color for all studios.
Why does pure blue look darker than light blue?
Pure blue can look dark at 100% tool brightness. Human eyes respond more strongly to green than blue, so adding some green makes a shade look brighter.
72%
Green's share of how bright a color looks
21%
Red's share
7%
Blue's share
The W3C relative luminance formula uses 0.2126 for red, 0.7152 for green, and 0.0722 for blue after the colors are converted to linear light. These figures describe an sRGB calculation. They are not brightness measurements of your monitor. Dark-looking pure blue is normal.
If pure blue looks too dark, try Light blue, Sky blue, or Royal blue first. I included these shades because changing brightness alone does not turn pure blue into pale blue. The device brightness control affects light output, not the missing red and green color values.
Blue screen vs. green screen: which is better for filming?
Green often works better for well-lit digital video. Blue may work better if the subject wears green, has blonde hair, or the scene is dark. Chroma key removes a selected background color so another image can show through.
| Filming situation | Usually better | Why |
|---|---|---|
| A close-up with no green clothing | Green | Digital cameras generally capture green well |
| A person wearing a green shirt | Blue | Green clothing is less likely to disappear |
| A subject wearing blue | Green | Blue clothing stays separate from green |
| Blonde hair or fine edges | Blue | Blue throws less colored light onto hair |
| A darker-looking scene | Blue | Lower blue brightness may reduce color spill |
| A small product with shiny edges | Test both | Reflections can spoil either color |
What the experts say
Adobe's blue-versus-green guidance explains that green is popular with digital cameras and suits daytime scenes, while blue can suit darker scenes and certain costumes. Blue came first: film cameras handled it well, and green took over with digital cameras, because most camera sensors have twice as many green dots as red or blue. Neither color guarantees clean edges. Blue may also need more light to record clearly, and hair, glass and shiny objects can reflect either background, so a short test clip matters.
Test first
If green clothing disappears in an edited clip, try a blue backdrop instead of increasing the removal strength. Check a short recording first. A little testing can save you from repeating the whole scene. For a quick answer, open Blue or green? under Also useful.
Three short lines in the tool above.
How do you use a blue screen for chroma key?
Set it up
Select Chroma key blue to show #0047BB behind a small subject. Position the display behind a hand, toy or close-up face, then film with another camera. Make sure the blue fills the area you plan to replace. A phone is usually too small for a full-body shot.
Light and test
Light the subject separately and check blue reflections. Test a short recording, then sample its blue in your editor. Set up a color backdrop opens the step-by-step guide on the Green Screen page. It shows where to put the screen and how to remove the color in your video app. Those steps work with blue as well, so you do not have to learn a different process.
#0047BB. Give your subject a little more light.
Check blue pixels on your display
Check blue pixels fills the display with pure blue and thin guide lines. On pure blue, only the blue part of each dot lights up, so a broken one shows as a dark dot that would hide on a white screen. The lines help you find that spot again.
A broken dot on blue
First, wipe off any dust, since a speck can look like a dark dot. Then compare the same area on a red screen and a green screen, because each color lights a different part of the dot.
Is a blue screen a good light to use at night?
Dark blue may look dimmer than light blue, but it still gives off light. In the evening, blue light can keep you awake more than other colors. Harvard Health reports that in one study, blue light held back melatonin, the sleep hormone, about twice as long as green light. It also suggests dim red lights at night. The National Institutes of Health also notes that light from devices at night can confuse the body clock.
2x
Blue light held back the sleep hormone about twice as long as green (Harvard Health)
For a dim light at night, try the red screen instead. For less glow, open a black screen or lower your device brightness, and keep any display as dark as the task allows.
Pure black for a dark room.
Download a blue screen background, wallpaper or video
Open Download an image or the Download tab to save a blue screen background or wallpaper. Choose a shade and size first. The file keeps the selected color at full strength even if you dimmed the live display.
| Size | Typical use |
|---|---|
| 1280 × 720 HD | Smaller frames and slides |
| 1920 × 1080 Full HD | Standard monitor wallpaper |
| 2560 × 1440 2K | Higher-resolution displays |
| 3840 × 2160 4K | Large backgrounds and projects |
| 1080 × 1920 Phone | Vertical wallpaper or a lock-screen image |
Opens the Download tab in the tool above.
Size and format
For a custom size, enter Width and Height, up to 7680 pixels on each side. Save as PNG, JPG or WebP. PNG keeps every pixel exactly; JPG may change some pixel values slightly.
Every download:
- Full-strength color
- Your chosen shade
- Up to 7680 pixels on each side
Blue screen video
Pure blue and Light blue also offer Download as a video. This opens Black Screen Video with the shade already selected, ready to save as a video file. You do not need a 10-hour blue screen video either: the live blue stays on as long as you like with Keep screen on.
Second monitor, sharing, timer and effects
Second monitor
If your main display holds filming notes, keep the blue on another screen. Choose Use a second monitor, then Choose a monitor where supported. Otherwise, select Open a new window, move it to the other display, and press F11.
Share and phone
Share setup copies a link with your choices. Send to phone displays a QR code; scan it to load the same shade, size and brightness on a phone. This saves you from selecting the color a second time on another device.
Timer and screen on
For timed sessions, choose Turn off after under Timer and effects. Leave it Off, or pick a short limit of one, five, 15 or 30 minutes. Longer limits are one, two, four or eight hours. Keep screen on stops the screen from going to sleep while the blue screen is open.
Lines, split and flash
Lines and split adds Thin, Medium or Wide guide lines, or shows half the screen black beside or above blue. These marks are not included in downloaded files. Flash and pulse offers Steady, Pulse, and Flash at 1, 2 or 3 flashes a second. Flash requires confirmation and runs only in full screen. It can affect people sensitive to flashing lights, so choose Steady when flashing is not needed.
The W3C flashing guidelines describe accessibility thresholds, not a promise of safety. Press Esc to stop.
Fills your other screen with blue.
Why does a TV or VHS player show a blue screen with no signal?
Many TVs and VCRs (VHS players) show plain blue when no picture signal arrives. A feature often called Blue Back replaced snowy static with a plain blue display, which made the missing signal clear without the moving noise.
Blue Back
What TV makers called the blue no-signal screen
A Japanese TV patent describes it plainly. When a channel has no signal, TVs and video recorders show a full blue picture, so the screen does not fill with noise. A menu switches the feature on or off.
If your TV turns blue today, check the cable and the Input or Source button first: a blue screen usually means that input has no picture.
What is the blue screen of death, and what should you do?
What it is
The blue screen of death is a Windows stop error, not a blank color backdrop. Windows shows it after a serious fault, often with a stop code such as MEMORY_MANAGEMENT, and then restarts. Microsoft's stop-code support page calls it a Blue Screen or Black Screen error, because newer Windows 11 versions can show it on black.
What to do first
In most cases, the restart fixes it and nothing more is needed. If the same stop code keeps coming back, write it down or take a photo of it. Microsoft's first steps are to remove any new hardware, update the drivers and Windows, and start the PC in safe mode. Its page lists every step in order.
Other color screens
For tracing, soft lighting or checking white areas, open the white screen. A full black screen gives you a dark display, and the red screen gives a dim light for the night. Use this page for a chosen blue shade, a quick color check or a small filming backdrop.
Gives a bright, warm or cool white for tracing or video calls.
Gives the green that video apps swap for a new background.
Gives a dim red light for the night, from pure red to night red.
Bright white for light and tracing.
Frequently asked questions
Can I show a full blue screen on a TV or projector?
Yes, if your TV or projector has a compatible browser, or if it is connected to a computer that opens the tool. A connected display may also work with Choose a monitor or Open a new window, depending on browser support. Keep the blue in full screen so no menus show. A projector also changes how blue looks on different walls. Try a small test before using the color in a presentation.
Can leaving a solid blue screen on damage my display?
No. A plain blue screen can't leave a mark, because every dot shows the same blue and nothing stays in one spot. In full screen, even the controls hide. Marks, called burn-in, come from bright shapes left in one place for hours on some OLED screens, like a logo or a taskbar, as Samsung's panel care guide explains. On an OLED screen, turn Lines and split off for long sessions.
Does a blue screen use more phone battery than a black screen?
Battery use depends on screen type and brightness. On OLED phones, black pixels can switch off while blue pixels stay lit. LCD screens use a backlight, which does not switch off just because the image is blue. Purdue University research shows that brightness changes OLED power use the most. Lower your device brightness, or choose black when color is not needed.
Is this blue screen free, and does it record me?
The color display is free to open in your browser, and no account is required. Showing blue does not require camera or microphone access. You only use a camera if you choose to film the screen with another device, or scan the Send to phone QR code. Your footage and photos stay with whatever camera or editing app you decide to use.
Why does the same blue look different on my phone and laptop?
Two devices can receive the same hex code but show different results. Display technology, brightness, viewing angle and color settings all affect the image you see, and night-color features may shift it as well. Open the same Share setup link on both devices, turn off color-changing filters if useful, and compare the screens straight on. If you film with blue, compare the recorded footage rather than the two panels.
Ready for a blue screen?
One click, no install, no sign-up. Press Esc whenever you want to come back.