Like everyone has said, dont do it even if your barely second guessing yourself. Interior color is a big deal. Something that you are going to have to live with as long as you own your car. I personally do not like red interior on anything, even a red car. But thats just my opinion.
The only car I've ever seen with a red interior that looked good was the Mach 5 from speed racer. All the others are hit or miss. Either you love it or hate it.
2011 V6 Mustang - Premium 202A Spec (Pony Package) - SOLD!
2014 V8 Mustang - Premium 400A Spec
6 Speed Manual, 3.31 Rear
Black, Charcoal Black
Comfort Package, Security System