1. My Dell U2520D display shows magenta cast on a standard mode on both windows and mac. I think I am aware now that even if I use RGB ICC profile with this wider gamut display it will still look oversaturated by non color aware apps. And since my only need is sRGB space I tried the display's RGB mode but colors looked faded and not a good emulation of sRGB. I have a MacBook 16 2020 to reference for soft tuning of certain settings available in Nvidia panel like input range for 8bit RGB with a limited quantization range. That looks like a wild guess at targeting a restricted color space, colors looked off. So what else can be done to correct the colors if not accurate then at least remove the cast and keep them balanced without making them faded?

  2. This monitor came with calibration report of deltaE < 1 so where and how does one use this accuracy? Is the ICC profile stored in display only? Then it should have worked with mac as mac shows one profile with dell's model name but results are oversaturated colors with standard mode, same results with sRGB or custom preset.

  3. Are there sRGB only monitors for Windows' non color aware apps under 300$? I don't mind little popping colors as long as there is no cast to them and they look balanced. I read people loved older Ultrasharps like U2415h etc. (silly me who thought newer will be better). If Benq says PD2500Q is 100% sRGB & Rec 709 only, then can i assume i will not see oversaturated colors? And how do I use their factory calibration with window's non color aware apps? or Does it mean that this calibration is waste unless I use color aware apps? Also curious how hardware calibration devices fix desktop colors as its a non color aware program.

  • \$\begingroup\$ thanks no rush, i am not happy with my lack of experience in displays and trusting a brand blindly and paid 500$. Just want to understand things to make better purchase next time. \$\endgroup\$ Jul 15, 2021 at 18:26
  • 1
    \$\begingroup\$ Zeus has beat me to a lot of the coverage on this - but just to note, no monitor ever arrives as flat & perfect as the manufacturers would have you believe. That's one reason why their supplied profiles are next to useless & you have to calibrate & profile using a colorimeter. I have two ostensibly identical Dell Ultrasharps & without profiles applied, one is red, the other green - which I see at every startup before the profiles switch in. As soon as they do, then they're identical. \$\endgroup\$
    – Tetsujin
    Jul 16, 2021 at 15:16
  • \$\begingroup\$ well my doubts were mostly why Dell is not picking correct settings on mac, they say DCCI automatically adjusts profile user don't need to do anything, even when i tried multiple profiles on mac with every preset nothing gave me balanced colors. Out of the box i got very nice colors on my new Benq sRGB monitor with windows desktop. \$\endgroup\$ Jul 16, 2021 at 15:32
  • \$\begingroup\$ I don't know what DCCI is, but unless you strap a colorimeter to the front of the display to calibrate it, all you've got is the manufacturer's 'average guess' as to how their screens look. Windows or Mac, neither of them can actually see what the screen is displaying. \$\endgroup\$
    – Tetsujin
    Jul 16, 2021 at 15:46
  • 1
    \$\begingroup\$ You didn't mention that at all until 6 comments in. If it's not behaving as expected send it back. If you want two completely different screens to match, you're going to struggle without correct profiling. \$\endgroup\$
    – Tetsujin
    Jul 16, 2021 at 19:12

1 Answer 1


Let's try. First, some magenta cast is indeed "normal" when you use wide-gamut displays with non-colour-managed apps.

If your "need" is only sRGB (and Rec.709), then it would make sense to buy a "normal" (i.e. sRGB) monitor. This is particularly true if you edit video, because the output colour management for video is less common and more demanding. It does not guarantee that you get correct colours, but at least you'll get "normal" colours that most people get, without oversaturation, even if the app is not colour-aware or if you don't set up colour management. Still, it's better to get a decent monitor that explicitly declares sRGB compatibility (and not just "coverage"), like that Benq PD2500Q you mentioned.

That said, wide-gamut monitor is, by definition, more capable. But you will have to become "colour aware" yourself, and be very careful in selecting the apps you use and setting up the colour management (in the OS and in each app). Ideally, you should buy a colorimeter and profile your monitor. (This will certainly be cheaper than buying another monitor now).

Now, some technical details. If your monitor claims "deltaE < 1" everywhere (which I find a bit hard to believe), it must specify with respect to what. Presumably, the monitor must be in its "native" colour mode without any adjustments, and you must use an ICC profile they supply. This profile is not stored in the display; it should come as a file on a disc or download, and you must install it in your OS. Check the manual carefully. Then, and only if you use a colour-managed app, you should see correct colours without a cast or oversaturation. Note this does not normally apply to the desktop and GUI: they are usually not colour managed. If you are comparing with another monitor side by side, you should use a photo or a test chart open in a colour-managed app (on both sides).

Alternatively, if your monitor has a dedicated sRGB emulation mode (and you intend to trust it), you could use it. In this case, you need to tell the OS that you have such monitor by installing an sRGB profile in the OS; or, alternatively, you could remove any ICC profile and thereby cancel any colour management. (This latter is not that good because you'll see desaturated colours for images that are created with wider gamut, which is not that uncommon today).

If you don't like sRGB emulation now, it could be two things:

  • You did install the full ICC profile and are applying it (i.e. viewing a photo in a colour-aware app). This would result in desaturated colours, because the OS believes the monitor is wide gamut whereas it is actually not (in the sRGB mode). Always remember that the ICC profile applies only to a specific mode; even if you change brightness, it may potentially shift colours. For this reasons good monitors lock most or all adjustments once they are calibrated.
  • It is actually correct (more or less) but you don't like it. This psychological effect is rather common when you switch from bright saturated colours to limited colours. (Just like we perceive louder music "better"). But remember that colour management is about correct colours, not "nice" colours.

You can only be sure what is the case if you profile the monitor with a colorimeter and then don't change any of its settings. Note that monitors gradually change colours as they age, especially when new, so ideally you'd need to do it periodically.

  • \$\begingroup\$ Note that Mac is colour managed throughout, including all displays individually, the desktop & all apps [except a couple of browsers, Chrome & Firefox, which have stupid colour defaults. They can be overridden to correctly profile. See photo.stackexchange.com/a/124357/57929 \$\endgroup\$
    – Tetsujin
    Jul 16, 2021 at 15:21
  • \$\begingroup\$ Thanks, not sure where to get this RGB ICC profile, i left OS at default & monitor on RGB which looked undersaturated. Again all i want is normal RGB desktop colors on that UltraSharp monitor, which I still don't know how to get. I can't buy 200$ device as accuracy is not much of a concern, the color balance should be okay. And Dell manual says DCCI automatically handles the profiling part of display when we first connect it but clearly it failed to do so on mac and windows. \$\endgroup\$ Jul 16, 2021 at 15:24
  • \$\begingroup\$ I got my Benq today, came with avg DeltaE of 0.51 , i have not applied the profile via their software yet and i already like this panel's color balance so don't even need that ICC tuning. And I am bit surprised how screen can look more sharper than ultrasharp display. I have one concern though, there's visible glare on left corner which constantly bugs me. Shall i ask for a replacement as its common ISP panels has some glow in corners, a gray on left has shine to it while right corner has yellowish effect. \$\endgroup\$ Jul 16, 2021 at 15:30

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.