wide-gamut.com

What is Wide Gamut?

Wide Gamut is a browser-based tool for checking what color range your display can actually show. It tests your device's color compatibility and reports back on standards such as sRGB, DCI P3, BT.2020 and HDR, alongside basic readings like browser, operating system, screen size, Retina status and color depth.

What it's useful for

• Checking a new monitor or laptop: confirm whether the screen really covers a wider gamut than sRGB before trusting it for photo or video work.
• Diagnosing "washed out" or oversaturated colors: see whether the display and browser combination is handling color profiles as expected.
• Quick environment snapshot: the browser, OS and screen readings help when comparing results across machines.

Practical limits

The page notes that Firefox does not support the test and recommends updated browsers such as Safari, Brave, Chrome, Opera, Edge or Arc. Results also depend on your operating system's color management and your browser, not just the panel itself, so treat the output as an indication rather than a lab measurement.

Next step: open the test in a supported browser, note the widest gamut reported, then repeat in a second browser. If the two results differ, the browser or OS color handling is the variable to investigate before blaming the display.

How can I tell if my monitor supports wide-gamut color?

Use a color-profile test page and compare what your monitor shows against what your operating system and browser report. Wide Gamut is built for exactly this: it presents wide-gamut, HDR, sRGB, DCI-P3 and BT.2020 color samples and reports the display details your browser can detect, including browser and OS identity, screen size, Retina status and color depth.

What to check, in order

1. Confirm the browser is reporting your display. Open the test in an updated browser. The page notes that Firefox does not support the test and recommends Safari, Brave, Chrome, Opera, Edge or Arc. If the page shows "UNK" for browser or operating system, the readings are unreliable.
2. Look at the wide-gamut and P3/BT.2020 patches. On a true wide-gamut screen, saturated reds, greens and cyans should look noticeably more vivid than the same patches on an sRGB-only display. If every patch looks flat or clipped, you are likely seeing an sRGB-limited pipeline somewhere.
3. Check color depth. A reported 8-bit depth is normal for most panels; 10-bit suggests a panel or mode that can carry more color data, though the page's reading alone does not prove the panel is wide-gamut.
4. Compare against a known reference. View the same patches on a second display you trust, or on a phone with a known wide-gamut screen. A side-by-side difference is the most reliable everyday signal.

Practical reading of the result

For a concrete scenario: a photographer editing RAW files should first open the test in Chrome or Safari, then cross-check the monitor's advertised coverage (for example "99% DCI-P3") in its manual or manufacturer page. The test tells you what the current browser and OS are passing through; the spec sheet tells you what the panel can physically show. If the two disagree, check the OS display profile and the cable/port (some connections cap color depth), then retest.

What do the sRGB, DCI-P3, and BT.2020 labels mean in the Wide Gamut test results?

They are the names of colour spaces—standard ranges of colours a display may be expected to reproduce. In the Wide Gamut results, each label tells you which of those ranges your screen appears able to show, alongside HDR and sRGB indicators and basic browser, operating system and screen-size readings.

What each label covers

• sRGB: The common baseline for web content, office software and most consumer images. A display that covers sRGB reliably will show ordinary websites and photos roughly as intended. Failing it usually means visible dulling or shifts in saturated colours.
• DCI-P3: A wider space used for cinema projection and, in practice, many modern phone and laptop screens. It extends mainly into richer reds and greens. A P3-capable display can show more vivid colour in HDR films, games and wide-gamut photos, but ordinary sRGB content still needs correct handling or colours can look oversaturated.
• BT.2020: A much larger space defined for ultra-high-definition television. Very few consumer displays cover it fully; a result showing support or partial coverage indicates headroom for HDR content mastered to that standard, not that every BT.2020 colour will appear accurately.

Reading the result

Treat the labels as a hierarchy of coverage rather than a score. sRGB is the minimum for general use; P3 matters if you edit photos, grade video or watch HDR material; BT.2020 is mainly relevant for HDR video work and high-end viewing. The test relies on the browser and operating system reporting display capabilities, so a result can reflect software limits as much as the panel itself—the page notes that Firefox does not support the test and recommends Safari, Chrome, Brave, Edge, Opera or Arc.

As a next step, check the same screen in two supported browsers. If sRGB appears in both but P3 differs, suspect browser or OS colour management rather than the hardware; if neither appears, the display or its settings are the likely limit.

Why does the test say my browser doesn't support it, and which browsers should I use?

The test is reporting a browser limitation, not a problem with your display. Wide Gamut's page checks colour compatibility through browser features that some browsers don't expose, so it shows a "does not support this test" message and falls back to unknown values (the "UNK" fields for browser, operating system and colour depth) instead of a real result.

Browsers to try

Wide Gamut itself recommends an updated browser and lists Safari, Brave, Chrome, Opera, Edge and Arc as examples. In practice:

• Safari on macOS is the most reliable choice for wide-gamut and HDR checks, because it is closely tied to the display's colour management.
• Chrome, Edge, Brave, Opera or Arc on current versions usually work, but results can vary by platform and version.
• Firefox is the one the page explicitly says does not support this test, so switch browsers rather than troubleshooting your screen.

What to do next

Open the same page in one of the recommended browsers on the same device and compare the reported gamut (sRGB, DCI P3 or BT.2020) and colour depth with what your display is supposed to cover. If the values still look wrong, check that you are not in a restricted mode such as a private window with strict settings, and that the browser is fully up to date. Use the result as a rough guide to whether your setup can show wide-gamut content properly, not as a calibrated measurement — for colour-critical work, a hardware calibrator is the more dependable check.

How do I interpret the display information Wide Gamut shows, such as color depth and Retina status?

Wide Gamut's readout is best treated as a quick sanity check on what your browser and operating system expose about your display, not as a calibrated measurement. The page reports your browser and OS, screen size, whether the display is flagged as Retina, the color depth in bits, and which color spaces it appears to support (sRGB, DCI P3, BT.2020, HDR). Use it to confirm a suspicious setup, not to certify a monitor for color-critical work.

Reading the fields

• Browser and OS: These matter because the test depends on what the browser reports. The page itself notes that Firefox does not support the test and recommends updated browsers such as Safari, Chrome, Edge or Brave. If you see unexpected results, try a different supported browser before blaming the display.
• Color depth (bits): This is the reported bits per channel. 8-bit is the common baseline; 10-bit indicates a wider pipeline, often via dithering or a driver setting rather than a true 10-bit panel. Treat it as "what the system claims," not proof of panel capability.
• Retina status: A "Retina" flag generally means the OS is treating the screen as high-density, so the pixel dimensions shown may be scaled logical pixels rather than physical ones. A large screen size with a modest resolution can look odd here for that reason.
• Color space support (sRGB, DCI P3, BT.2020, HDR): These indicate which gamuts the browser/display combination reports. sRGB is the safe web baseline; DCI P3 suggests a wider-gamut display; BT.2020 and HDR are the broadest and most likely to be misreported by drivers or browser settings.

A practical next step

Open the page in two supported browsers on the same machine and compare. If Chrome reports DCI P3 and 10-bit but Safari reports only sRGB and 8-bit, the difference is in browser/OS reporting, not your hardware. If you are preparing images for the web, assume sRGB unless you have a specific reason to export wider; for print or HDR video work, verify gamut claims with a hardware calibrator rather than a browser page.

When it is genuinely useful

A photographer checking whether a new laptop is actually running its wide-gamut mode, or a developer debugging why colors look washed out in one browser, gets a fast signal here. For anyone choosing a monitor or setting up a color-managed workflow, the page is a starting point; professional display reviews and calibration tools give the reliable answers.

Can I use Wide Gamut to check HDR support on my screen?

Yes. Wide Gamut is built as a device colour-compatibility test, and its page lists HDR alongside sRGB, DCI P3 and BT.2020 as colour standards it checks. So it can tell you whether your current browser and display combination reports HDR-capable colour support.

What it actually tells you

The tool reads what your browser exposes about your screen and shows results for each standard. That makes it a quick first check, not a full calibration or certification. Expect it to answer "does this setup report HDR support?" rather than "how good is the HDR experience?" — peak brightness, local dimming and tone mapping are outside what a browser-based page can measure.

Two practical caveats:

• The page itself notes Firefox does not support the test and recommends an updated browser such as Safari, Brave, Chrome, Opera, Edge or Arc. Run it in one of those, or a negative result may reflect the browser, not your screen.
• Results depend on the whole chain: display, cable, operating system HDR setting and browser. A "no" from one browser is worth rechecking in another before concluding your monitor lacks HDR.

A concrete scenario

You have bought an HDR-capable monitor and want to know whether streaming HDR video will actually work. Open Wide Gamut in Chrome and in Safari, compare the HDR line in each, and confirm HDR is switched on in your OS display settings. If both browsers agree, you have a reasonable signal; if they disagree, the browser or OS setting is the likely culprit.

For a second opinion, compare against Display Ninja for monitor HDR explanations or RTINGS.com for measured HDR test data on specific models — those cover brightness and contrast that a browser test cannot.