Apple Pro XDR Display color gamut P3-65

When using this display and color space above, is it best to convert a photo taken in the Adobe RGB 1998 space to an image with the profile "Image P3" to match the gamut of the monitor? Or is it best to leave the photo in Adobe RGB and expect to have some "clipping of colors?"

By @lwmsmd

If your largest concern is printing, your reference is the print, not the display, so there is no need to convert the file to serve the display. Edit it as best as you can within the display’s color gamut, and then when you print it will be subject to the limitations of the ink + paper color gamut.

Although you can be concerned with clipping, keep this perspective in mind: Although a P3 display might not cover all of the same colors as Adobe RGB, both P3 and Adobe RGB cover a much larger gamut than the roughly sRGB displays that professionals edited print jobs on for decades. So a P3 display is still a huge improvement over the past.

I have read that the profile P3-65 represents about 85% of the colors available in Adobe RGB. This appears to especially confusing when I try to print an image.

By @lwmsmd

An important thing to remember is that percentage comparisons of color gamuts are not very useful. The reason is that the 3D shape of real world color gamuts is not uniform, not a perfect sphere or cube. Their shapes are highly irregular. One misinterpretation from reading that percentage is to conclude that P3 covers fewer colors. But that is not true, or at least it’s incomplete, because it goes both ways. The irregular shapes mean that it is also true that Adobe RGB covers less than 90% of colors in P3. 

In the 3D comparison below, you see that neither gamut fully covers the other, so what they really do is cover different similar gamuts. P3 D65 is shown in gray, so you can see that over some colors it falls short of Adobe RGB, but in other colors P3 D65 extends further than Adobe RGB. So actually, neither is fully superior to the other…both are great wide gamuts.

Another major problem with a percentage comparison is that it doesn’t tell you which colors are missing in the percentage they don’t have in common. How much do those missing colors matter? Are they mostly purples, but your images don’t use purple so the difference doesn’t matter? Or does the color difference affect colors in your landscapes or product photos, so it does matter?

Also, a percentage comparison tells you nothing about how well the display color gamut covers matches up with the gamut of the ink and paper combination you will use. What you see below, left to right are: First, a common CMYK print gamut (Coated FOGRA39), then how much that print gamut is covered by P3 D65, then by how much that’s covered by Adobe RGB. What you see is that both P3 D65 and Adobe RGB cover almost all of that Coated FOGRA39 print gamut, and both can’t reproduce a small portion of Coated FOGRA39 extreme blues/greens (the little bit shown in gray). What you don’t see is that if these were rotated, on the other side both P3 and Adobe RGB can reproduce all of the warm colors in Coated FOGRA39. 

In general, what this tells you is that Adobe RGB can reproduce slightly more print colors than P3. But whether that difference is important depends on what colors are in your images, and what printing conditions you need to target. For example, this comparison has different results when compared to uncoated FOGRA39, and different again when compared to the color gamut of my inkjet printer.

Most of the time you’ll find P3 D65 is just as good as Adobe RGB, and depending on the colors in the image and the print color gamut, maybe sometimes better.

@lwmsmd As DigitalDog wrote, it's up to you. Personally I'd leave the image in its original colourspace because every transformation between colour spaces is potentially damaging (even if only slightly). There's no real advantage in having the document colour space match the display colour space.

If you're eventually making an image for web then save the original. make a copy, convert to sRGB + embed the profile 

I hope this helps
neil barstow, colourmanagement net - adobe forum volunteer - co-author: 'getting colour right'
google me "neil barstow colourmanagement" for lots of free articles on colour management

Short answer; doesn't matter. You've got some RGB working space and it is tagged; you're done. If you need to post it to the web and the browser isn't color managed, convert to sRGB (no guarentee of proper viewing but the safest option). The less conversions, the better.