I had questions about the P3 color gamut of the new iMac, so I went over to my local Apple Store to check it out.icm (Windows)/Nikon Apple RGB 4.0.0 (Mac OS). 499.99 Pre-order Samsung Space Monitor.The Late 2015 Retina iMac includes the first wide gamut display that Apple has made for a Mac, able to reproduce colors well outside the sRGB color gamut. Seven days of Special Offers. Rotate Samsung Space Monitor and lose yourself in its 360-degree beauty. Discover the 360 Splendor. Feel the inspiration to use Space Monitor everywhere in your life and watch how it can make your life feel more glamorous.
What Display Color Profile To Use For Video Software Nor TheFor objectively accurate color, you need to use a colorimeter.Up to this point it’s been a conscious choice to buy a wide gamut monitor. These programs rely on your eye, and eyes are subjective. Neither online calibration software nor the calibration tools that come with your Windows or Mac operating system will help you obtain accurate color.On the iMac I tried, the selected profile was named iMac.Was the iMac profile the correct profile? I selected “Show profiles for this display only” and the only profile left was iMac. On many Macs the default display profile is Color LCD. The first thing I did was open the Displays panel in System Preferences to check out the list of display color profiles. What’s the default display profile of the Retina iMac ?At the Apple Store I went straight to the first 27″ Retina iMac I saw. Many wide gamut displays today are based on Adobe RGB, which I’ll also talk about in this article. P3 is larger than sRGB by a big enough amount that a display that can cover P3 colors is considered a wide gamut display.They were nearly identical: The iMac default display profile is very close to the P3 color space. Then I clicked the Display P3 profile. First I clicked on the iMac profile to see the size and shape of the color gamut. That author also tried something that I didn’t: They brought a colorimeter to the Apple Store, hoping to make their own profile and gamut plot of the P3 display. However, the Color LCD profile is close to the sRGB profile, so I’m not sure why the Color LCD profile is even included with the iMac because its gamut is too small to describe the iMac display.Color LCD gamut over iMac display profile gamut (left), and sRGB profile gamut over iMac display profile gamut (right)At the Apple Store I didn’t have time to do much testing with real images, but an excellent article at astramael.com ( The Wide Gamut World of Color — iMac Edition) does use sample photos to show the tradeoffs between the Adobe RGB, P3, and sRGB color gamuts. According to the Apple Developer API Reference, Display P3 “uses the DCI P3 primaries, a D65 white point, and the same gamma curve as the sRGB color space.” It looks like Apple wanted to keep as many sRGB characteristics as possible as they expanded the color range to the P3 color gamut.What if we compare the iMac profile to the Color LCD profile that is also found in the list of display profiles on this iMac? The Color LCD profile gamut is much smaller than the iMac and P3 profiles. A backlit device display reproduces images differently than a cinema projector in a dark theater, so when Apple adapted DCI-P3 into their own profile that they call Display P3, Apple adjusted their version to be more consistent with typical computer displays. The difference between the Display P3 and iMac profiles is probably that the iMac profile represents the color gamut that the display panel is actually capable of reproducing.However, neither the iMac display profile nor Display P3 is exactly the same as the DCI-P3 digital cinema standard. Even when I turned up the brightness of the MacBook Pro all the way, the colors in the iMac screen were much more vivid. I opened the same windows on the iMac and on a 15” 2015 Retina MacBook Pro near it. I looked at things like the colorful icons in the Applications folder and the graphics in the Maps application. When those untagged color values are displayed on a larger gamut display, if their gamut is simply scaled up to match the larger gamut the color values can end up further out than they should be in the larger color space, appearing oversaturated.I believe I saw evidence of this when looking at the Late 2015 Retina iMac. This can happen when the color values of untagged objects are defined in a smaller color space such as sRGB, which is usually the case. — Ricci Adams OctoDoes the iMac P3 display have an sRGB mode?Wide gamut displays can be a challenge for developers of games, mobile apps, web sites, and other content targeted for average consumer displays, because of the oversaturation of untagged content that I just described. Safari will correctly treat CSS colors as sRGB, and render wide-gamut images.For web developers on the 2015 iMac: only Safari 9 correctly treats CSS colors as sRGB. When Safari sees an image that is tagged with a color profile it will continue to do what it correctly did before: use the image’s profile to convert its colors to the wide gamut display profile, in this case iMac P3.New iMacs have wide-gamut displays. The tweets below explain why untagged colors in Safari are no longer as screwed up as they used to be on a wide gamut monitor: Safari now does the right thing, in that when Safari 9 sees colors without a profile (untagged) it will assume the colors are in the sRGB color space and convert to wide gamut from there. I see the same effect on untagged objects when my NEC PA272w display is in wide gamut mode.I hope to hear more about general untagged color handling on this display from anyone who knows more or is able to test it more thoroughly.As for the Web, it looks to me like untagged image and CSS colors are rendered correctly in the Safari web browser, but not necessarily outside Safari, such as in the Finder. To me this indicates that Apple may not have completely color-managed Mac system elements for wide gamut displays. I’m not 100% sure that there is no sRGB emulation mode on this display, but that’s how it’s looking. In general, the Mac help files for color management are pretty thin.If the iMac P3 display doesn’t have a way to emulate an sRGB display, buyers of the Retina iMac should be aware that colors might not display as expected in untagged objects or in applications that are not color managed. When I searched the system help files of the iMac for “P3” or “sRGB” nothing came up. The Retina iMac doesn’t do it either way, or at least not in any way that I was able to find. Some let you switch to an sRGB emulation mode through a control on the front panel of the display with others you switch modes using utility software. Emulator of mac ipadSo choosing the sRGB profile can’t and won’t make the monitor display the sRGB gamut. A display profile describes the color behavior of the display, but it can’t change that behavior. That is not going to help, because that’s not how display profiles work.
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