Pure black and near-black are different test patterns. Pure black is commonly represented in web color notation as #000000. A near-black shade such as #101010 is still very dark, but its red, green and blue values are above zero. The patterns ask different visual questions, so choosing the right one can make a screen check easier to interpret.
What a pure-black pattern can show
A pure-black field gives the display a uniform black signal. It can make a bright point or light near the edge easier to notice, particularly on an LCD display. But what you see is affected by room reflections, brightness, viewing angle, local dimming, browser behavior and other settings. A gray-looking black field is not, by itself, proof of a defect.
OLED panels create light at the pixel level and can turn individual pixels off for digital black. That is different from an LCD, which uses a backlight. Even on OLED, the room can reflect light from the surface and settings or source behavior can change what reaches the panel. Use the OLED Black Screen Test for more context about OLED-specific observations.
What near-black adds
Near-black patterns contain dark gray values just above black. They can help you inspect whether subtle dark steps remain distinguishable, whether a dark area looks uneven, or whether several nearby tones blend together. This is a visual check of dark detail, not a direct measurement of gamma, luminance or panel uniformity.
Professional display-testing approaches distinguish gray uniformity from black uniformity. For example, RTINGS describes using a mid-tone gray and a near-black gray pattern for gray-uniformity checks, while pure black is a different test condition. Its procedure is an example of controlled TV testing, not a universal pass/fail rule for every computer monitor.
Choose a pattern by the question
| What you noticed | Try first | Then compare |
|---|---|---|
| A bright or colored dot on dark content | Pure black | White, red, green and blue using the pixel test. |
| A dark dot on a bright image | White | Red, green and blue, checking if the point stays fixed. |
| Bright area at LCD edges | Pure black at normal settings | Near-black and a slightly different viewing angle. |
| Dark detail disappearing | Several near-black steps | The contrast pattern and the same image under usual settings. |
| Broad tint or brightness patch | Gray field | Other gray levels in the uniformity test. |
A careful comparison routine
- Set a normal picture mode and comfortable brightness; note HDR state if relevant.
- Use pure black briefly and scan the center, edges and corners from your regular position.
- Switch to a few near-black or dark-gray steps and look for detail that disappears or patches that stay distinct.
- Reduce strong reflections if necessary, then repeat without changing other settings.
- If a point concerns you, cycle other solid colors and note whether it stays fixed in the same physical place.
Do not judge only in a pitch-dark room at maximum brightness. That setup can expose faint variations, but may not reflect normal use. For a warranty or repair question, follow the model’s own support guidance and record what you observed.
Why LCD and OLED results differ
On LCD, black and near-black appearance can be influenced by the backlight, panel design, reflections and local dimming. On OLED, black pixels can turn off, while a near-black tone asks them to emit a low level of light. Neither technology guarantees that every unit will look identical across all gray levels. A pattern that helps identify an LCD edge glow may not be the best pattern for subtle OLED near-black uniformity.
What a browser pattern cannot prove
A web page displays digital colors; it does not measure the light coming from the panel. The browser, operating system, graphics driver, input range, HDR processing and room can all influence the image. A single spot on one pattern does not identify its cause or warranty status. Repeat the observation with a relevant second pattern, another source if possible, and consult the manufacturer before making a repair or replacement decision.
Further reading
- RTINGS: Gray uniformity and near-black testing — an example of controlled TV testing.
- EIZO Monitor Test — an overview of separate visual checks for pixels, uniformity, gradients and viewing angle.
A code value is not a brightness measurement
A color value such as #101010 tells the browser which digital color to request; it does not tell you how many nits the display emits. The visible result depends on the display’s transfer function, settings, operating-system processing, HDR mode and room. A pattern that appears almost indistinguishable from black on one screen may be easier to see on another. If you need measured luminance or calibrated shadow detail, use a colorimeter or a documented calibration workflow rather than trying to infer a number from a webpage.
Separate dark detail from uniformity
Ask yourself whether you are checking tone separation or whether one area differs from another. For tone separation, compare adjacent near-black steps and note which ones merge. For uniformity, show one flat gray field and compare different parts of the panel. The questions are related but not identical. A panel might show clear steps in the center and still have a darker corner, or it might look even across the panel while several dark steps blend together.
Example: deciding what to test next
Suppose the corner looks bright on a black field. Keep the display at its normal brightness and check whether the spot remains fixed as you change to a dark gray. If it changes strongly when you move your head, note the viewing angle. If instead the concern is that dark movie details disappear, use near-black steps and compare them at your normal picture settings. In both cases, repeat once before making a change. This turns a vague impression into a specific observation that you can describe to support.
Do not diagnose burn-in, OLED uniformity, backlight bleed or a defective pixel from a single image. Those topics have different mechanisms and may need different patterns or manufacturer diagnostics. The site’s black screen, OLED guide and uniformity tool each cover a different part of that inspection.