How can a designer work normally on an iMac 2017 in a P3 color profile? After all, most have sRGB?

Question

Design

Hello. I used to sit on Windows with a good Delovsky monitor, stood sRGB, everything looked fine. Recently bought iMac 2017 4K, everything is great. However, when buying, I did not pay attention to the extended color reproduction of P3. Now I did a design in the Sketch in the P3 color profile, everything looked good. I sent this design to a friend, he asked what I used? Colors are very dull.
I did not understand anything, because I am no longer a beginner in design. After some time, I caught up with the fact that there are few monitors with P3. Even pre-2015 Macs didn't support them. Switched to sRGB and everything was ok. But sRGB looks outrageous on my Mac, with unnaturally bright colors. This makes my eyes tired quickly.
1) As I understand it, set the usual P3 color profile and design for the web, mobile phones will not work? After all, I will not be able to see how the color will look on the final device. It makes no sense to make a design that looks cool to me, but not to the end user.
2) Is sRGB the default on Windows 10?
3) What do you recommend? Sell ​​poppy do not advise.

Answer 1

Of course, the designer needs to see all the colors.
Well, the customer does not need this. More precisely, there is no guarantee that he has a professional monitor and is calibrated as expected once a month.
Share already intermediate working design materials.
And the result is ready.
These are different things. And different formats. And different color profiles.

Answer 2

I have a 2011 iMac, it also has an optional P3 profile, I don't see any problems switching to other profiles.

Answer 3

sRGB is a stripped-down but still color gamut. There are bright ones, and dull ones, and even with a hole, albeit a little). This "truncated" profile was created, if my memory serves me, so that any seedy monitor could show it. Like such a universal color gamut "even for managers and loaders."
How can a wide color monitor not display sRGB correctly??? It should correctly reproduce these colors in the off state with tied pixels.
Sit down, read books on how color profiles work - you have done something in your settings.
PS And at least it is strange to USE the capabilities of a certain luxury monitor doing work for an unknown type of playback. Well, it’s immediately clear that they can look at a file on a 25-year-old kinescope LG or on a 10-year-old flat Samsung office ... They will explode, melt, but your super-juicy colors will never be shown to anyone!