What Is My Screen Color Depth Checker: 8-bit vs 10-bit
What Is My Screen Color Depth Checker. Open this screen color depth checker to see your Color Depth, bits per channel and total colors at once. The hdr checker gives you a clear, actionable result instantly, with no sign-up required.
Interactive Tool
Your Screen’s Reported Color Depth
Depth class: --
HDR-ready depth: --
Suggested color profile: --
The Screen Color Depth Checker reads your browser's reported color depth and pixel depth and converts them into the total colors your screen can theoretically represent, then cross-checks that figure against a live dynamic range reading so you're not relying on one number alone. Most modern browsers report a flat 24-bit depth regardless of your panel's real capability, and this tool tells you plainly when that's what you're looking at.
Ever asked what is my screen color depth checker result really says about your monitor? This page reads your browser-reported color depth, then shows gradients that expose banding, so you can tell a 6-bit, 8-bit or 10-bit panel apart. Dithering and near-color discrimination add hardware clues that your browser cannot report, and HDR support rounds out the picture of what your colors can do.
What Is My Screen Color Depth Checker Reading?
The tool asks your browser for a value, then lets you confirm it by eye. Check your color depth in seconds: a reading of 24 means 24 bits per pixel (8 bits for each of red, green and blue), while 30 means 10 bits for each channel. Use it to detect color depth, then lean on gradients for color depth detection that goes beyond software. Your eyes are the final judge, so the color depth checker always pairs a number with a visual test. Run your input through the display specs report tool to get a detailed breakdown in seconds.
Reading Pixel Depth in Your Browser Results
Two values matter: screen.colorDepth and screen.pixelDepth. Most browsers report 24-bit even on a 10-bit display, and a 30-bit value appears only when the operating system exposes it. The tool also draws on a canvas to see whether more than 8 bits per channel survive, which is why the answer is browser-reported and best-effort. Your display color depth belongs to the display itself, while the report describes only the software path to it. The touchscreen checker tool gives you a clear, actionable result instantly, with no sign-up required.
Native vs Advertised Depth by Panel Type
A spec sheet may promise 16.7 million colors from a display that is natively 6-bit, so advertised depth and native depth can differ. The number of colors grows with bits per channel \(b\):
$$\text{colors} = \left(2^{b}\right)^{3}$$
| Format | Levels per channel | Total colors | Typical use |
|---|---|---|---|
| 6-bit | 64 | 262,144 colors | Budget displays, laptops |
| 8-bit | 256 | 16,777,216 colors | Office and gaming monitors |
| 10-bit | 1,024 | 1.07 billion colors | Professional displays |
6-bit Panels With FRC
A 6-bit panel shows 64 levels per channel and uses FRC (frame rate control) to imitate 16.7 million colors. Expect banding in shadows, and sometimes faint flicker. Budget displays and entry-level laptops often work this way.
Native 8-bit Panels
A monitor with 8-bit color gives 256 levels per channel and matches the sRGB standard. Most consumer displays are native 8-bit, including mid-range gaming monitors, and gradients look smooth in everyday use.
10-bit and OLED Displays
A 10-bit display offers 1,024 levels and finer color precision, which suits HDR playback. Native 10-bit is common on OLED screens and in professional work, though some 8-bit models with FRC are labelled 10-bit.
How a Color Depth Test Finds Banding
Run the test in a darkened room at your native resolution, sitting at a normal viewing distance. Across a grayscale gradient 1,600 pixels wide, each band measures \(1600 \div 2^{b}\) pixels: 25 px with 64 steps, 6.25 px with 256 steps and 1.56 px with 1,024 steps. Narrow bands blend into a smooth gradient, while wide ones show visible steps, the color banding this banding test hunts for. A smooth result suggests good color reproduction but never proves color accuracy.
Shadow Gradient Check
Watch the darkest 15% of this tool's ramp first, where grey levels are fewest. Wide steps in a dark gradient point to a low-depth display, while a smooth result there is consistent with 10-bit, with pixels blending instead of grouping into obvious blocks.
Near-Color Discrimination
The tool's patches on your monitor differ by a single RGB value, and you count the pairs you can separate. The more pairs you tell apart, the finer the steps are likely to be. Reset brightness and gamma beforehand, because both change what you see.
Dithering Detection
Stare at a mid-grey patch for five seconds. Grain or flicker from FRC points to temporal dithering, a fine checkerboard of pixels points to spatial dithering, and neither suggests a native panel. Visible dithering means the checker's verdict probably rests on FRC, so read the reported 24 as the signal path, not the display itself.
HDR, Color Gamut and Display Bit Depth
HDR content needs 10-bit, because HDR10 spreads a wide dynamic range across many more levels than 8 bits can hold. An 8-bit display shows banding in HDR skies and sunsets, which is why budget HDR labels disappoint. A wide gamut matters too: a display P3 screen reaches more saturated colors than sRGB, and the color gamut is a separate property from bit depth, so check both on your display at full size.
Verifying a Monitor Sold as 10-bit: A Worked Check
I'm checking a 27-inch 3840 × 2160 monitor whose box says "10-bit", before I decide whether to keep it for photo editing. The color depth checker's reading comes back as 24, which already hints that my current setup delivers 8 bits per channel. A reading alone proves nothing, so I open the grayscale ramp across the full 3,840 pixel width. Each band should be 3,840 ÷ 2b pixels wide: 60 px at 6-bit, 15 px at 8-bit and 3.75 px at 10-bit. In the darkest stretch I can count steps about 15 px apart, so this is behaving as 8-bit.
The panel may not be the culprit. A 4K picture at 60 Hz uses a 594 MHz pixel clock (4,400 × 2,250 total pixels × 60), so the link must carry that many pixels per second at the chosen bits per pixel:
| Signal at 4K, 60 Hz | Data rate | Fits HDMI 2.0 (14.4 Gbps)? |
|---|---|---|
| 8-bit RGB (24 bits per pixel) | 14.26 Gbps | Yes, barely |
| 10-bit RGB (30 bits per pixel) | 17.82 Gbps | No |
| 10-bit YCbCr 4:2:2 (20 bits per pixel) | 11.88 Gbps | Yes |
That table explains the 24: HDMI 2.0 carries 18 Gbps raw but only 14.4 Gbps of data after 8b/10b encoding, so 10-bit RGB at 4K 60 Hz cannot pass and the driver quietly falls back to 8-bit. I cross-checked the arithmetic by hand against the 14.4 Gbps limit, and the numbers agree. The number to watch is that 17.82 Gbps requirement, not the monitor's marketing label.
My next action is specific: switch the output to 10-bit with 4:2:2, or move the monitor to a DisplayPort 1.4 cable, whose roughly 25.9 Gbps of data easily holds 17.82 Gbps. Rerunning the ramp after the DisplayPort change, the bands shrink to the 3.75 px I computed, and the reading becomes 30. One caveat: 4:2:2 halves color resolution, which smears thin red text, so for office work the DisplayPort route is the better trade-off. A smooth ramp also cannot separate native 10-bit from 8-bit plus FRC, so I confirm with a colorimeter if the purchase depends on it; the color depth reading tells me the path, not the hardware.
Raise Your Bits per Pixel: Cable and Output Fixes
- Set output color depth to 10-bit in the NVIDIA Control Panel or your AMD settings.
- Use an HDMI 2.0 or DisplayPort cable; older hardware may drop to 8-bit at 4K and a high refresh rate.
- Turn on HDR only after 10-bit output works, and confirm every link from app to monitor supports it.
Update the GPU Driver
If the checker keeps reporting 24 after the cable fix, an old GPU driver may not offer 10-bit output at your resolution, so update it, then rerun the test before blaming the panel.
Why Check Your Color Depth Before Buying a Monitor
Designers, photographers and gamers gain different things: photo and video editing and color grading need smooth gradients, while gaming needs speed. Before an upgrade, run the test, then use a colorimeter and a correct color profile for calibration, because image quality and accuracy depend on more than bits. Troubleshooting banding or HDR problems starts with this check in your browser.
What Browser Values Cannot Show
The checker reports the path your software sees (24 or 30) and shows banding, but a reported value cannot reveal the native panel depth, so treat a smooth result as supporting evidence, not certification.
Frequently Asked Questions
- What is the difference between 8-bit and 10-bit color depth?
- An 8-bit panel shows 256 levels per channel (16,777,216 colors), while a 10-bit panel shows 1,024 levels (about 1.07 billion colors), giving smoother gradients and less banding, especially in HDR.
- What does 32-bit color mean on my system?
- 32-bit usually means 24 bits of color (8 per channel) plus an 8-bit alpha channel for transparency, so the visible color depth is still 8-bit per channel.
- Why does my browser report 24-bit on a 10-bit monitor?
- Browsers often expose only the operating system's reported output depth. A 10-bit panel can still read 24 when the driver, cable or app output is limited to 8-bit.
- Is a 6-bit panel a problem for daily use?
- For web and office work it is usually fine, but 6-bit panels rely on FRC dithering and show banding in dark gradients, so they are a poor fit for photo or video editing.
- What is FRC dithering?
- Frame rate control rapidly alternates two nearby colors between frames so the eye blends them into an in-between shade. A 6-bit+FRC panel imitates 8-bit, and 8-bit+FRC imitates 10-bit.
- How does color depth relate to HDR?
- HDR10 needs at least 10-bit color to hold its wide brightness range without visible banding, so an 8-bit display shows steps in HDR skies and sunsets.
- How can I confirm my panel's true color depth?
- Check the manufacturer spec sheet, then view a grayscale gradient in a dark room at native resolution. Visible steps suggest lower depth; a colorimeter gives a definitive answer.