I was a huge IOM skeptic before seeing it in person. In photos, and in overcast lighting, it still looks very reddish like "tomato soup". But, in direct sun or bright lighting (in person) it is definitely orange. More orange than red to me.
However, this color is NOT like hugger orange. Not even close. I still own two hugger orange '69 Camaros and also had a hugger orange 99 Camaro SS. I'd say the IOM color has some bright orange flakes in the paint, but the basecoat is far more red like than Hugger. During Hot Rod Power Tour a couple years ago, GM rolled around in that convertible concept Camaro. THAT color was closer to hugger metallic. It was brighter than IOM, even in the shade.
Both of these pics taken by the same camera, in similar lighting. IOM had a little less "glow" to it in person. But, the concept had some very expensive paint also, I believe the GM director of special projects told me it was something like $20K to paint the concept.
I'd own an IOM car after seeing/driving one. I like the color, but not as much as my cyber gray one.