I agree with Daisy that the first and third of her images are more or less what 'Absolute Treasure' looks like, at least in my garden.
I have a general impression that images from my cell phone are more saturated in color than those from my digital camera, but I can't really prove it.
I'm also going to chime in here and say that apart from color, unmanipulated images can also make a flower appear cleaner (have more clarity of color) than it is in real life. I once had a daylily seedling which basically bloomed a rose bitone. From the image you would think that it was a gorgeous clear bloom, but in reality the bloom was horribly muddy. (As to how that relates to irises... My general feeling about "red" and some "orange" irises is that they have a lot of mud in their color. (Some of the oranges are not too bad and are acceptable in my garden.) What this means to me is that you should try to see the iris bloom in "real life" before you buy it, especially if it is a new and pricey red or orange introduction, because you might not like what you get.)