The mini is around 60% sRGB, the Air is around 110% sRGB.
100% sRGB is considered ideal, with truest to life colours.
Actually, 100% sRGB is
far from ideal - we can see a much wider range of color than that.
The issue is that with these being low power devices, they are not color managed.
Most content for the web is designed with sRGB as the target, so 100% sRGB is "accurate" for the web.
However, there are many more colors outside of the sRGB gamut which our eyes can see.
If you had today's iPad with a display which showed "200% sRGB" then color would look extremely over-saturated.
But if your software supported color management (Firefox is the only fully color managed browser) then any content designed for the web in sRGB would look exactly the same as a display limited to 100% sRGB.
So what would the point be? Well the display would have the ability to go far beyond sRGB where appropriate. E.g. When displaying Adobe RGB or ProPhoto RGB images.
I don't understand all of this. If anything the ipad retina and ipad air suffer extreme color inconsistencies. Blue looks purple. My ipad 2 and original ipad mini were spot on color wise but my ipad 3 and ipad air look terribly purple where its supposed to be blue. My new ipad mini retina shows the correct colors. Have people gotten so used to the incorrect colors of the retina ipad that they are expecting it to be incorrect now on the retina mini? I too favor the natural correct colors of the mini retina over the ipad air. Seems to me the gamut on the air is defective.
Actually, this is a very common problem, going back to when LCDs were just approaching sRGB gamuts themselves.
The short version is: the Air is actually displaying the
correct color.
While the Mini has a smaller gamut and less accurate color than the Air, blue is shifted way off towards cyan, so it actually looks
bluer than it is meant to, but not as rich.
The solution for this is time. It just looks wrong because it's not what you are used to.
Spend a while with a 100% sRGB display and then go back to something with a smaller gamut. It no longer looks like the older display is correct.
Well it's not very scientific but here is a shot of what I see. The ipad mini retina is on top and the ipad air on bottom. The ipad mini retina is an exact match although it does look washed out in the photo, perhaps the angle but you can see what the air does to the color, it blows it out over vibrant.
There are a number of issues with this comparison - the main one though, is that you are relying on the device's cameras to deliver accurate color, which they most certainly do not.
If the photograph itself is not true-to-life, then you cannot judge the displays based on that image.
As for the Air vs the Mini... I sold my iPad 3 a couple of months ago, intending on buying a Surface Pro 2. That did not work out, actually because they did not update the display from the original and do not have 100% sRGB coverage. I don't consider that acceptable for a $900 device.
After having a couple of months without a mobile device at all, just my desktop PC, I'm re-evaluating what I want from a tablet.
I think I actually want the smaller size of the Mini rather than the Air, and as a much cheaper device, I'm willing to overlook that problem - I'll just sell it for the inevitable model with an updated display next year.
Both the Air and Mini have 20-30% less RAM available than my old iPad 3 due to the switch to 64-bit anyway, so I would be replacing either one next year regardless.
And hopefully next year we will see a Surface tablet from Microsoft with an 8" 1920x1440 4:3 display and an Intel CPU. That's what I
really want my next tablet to be.
If Apple had not reduced the weight and size of the iPad so much with the Air, and Microsoft had not flubbed with the display and battery life on the Pro 2, I would probably have made the switch to that already.