Preheat grill to medium-high heat (450F).
Grill corn and orange bell pepper until charred all over, rotating every 3 minutes.
Let corn and pepper cool until safe to handle.
Cut kernels from corn cobs into a large bowl.
Core, seed, and dice bell pepper to match corn kernel size.
Add diced tomato, red onion, cilantro, jalapeno, and garlic to bowl.
Add chili powder, hot sauce, olive oil, lime zest, and lime juice.
Toss everything together.
Season with salt and pepper to taste, starting with 1/2 tsp salt.
Let sit 30 minutes before serving for flavors to meld.
Store in fridge up to 3 days.