So i mixed americolor terracotta color with my fondant and it looks reallu peachy. I was thinking of adding a little red??

Have a burnt orange? If not, I would add some red and maybe a hint of orange.

I've used Americolor terracota and it came out fine. Maybe you just need to add a little more to deepen the color?

I would try adding more... then maybe a tiny bit of orange if that still didn't work; &/or brown. Maybe test a small area first. The Americolor gel terracotta has always worked for me - but I think it did look peachy when I didn't use enough. Good luck!