You can use any color peppers you like, but a combination of red and green bell peppers are what I use. You can make it with all red bell peppers, all green peppers, or throw in a yellow or orange pepper. Yes, you can use any color peppers you like. You can even add in hot peppers, like jalapeno peppers or your favorite hot pepper. Any combination of peppers will work and the spiciness will depend on what you use and if you add in the red pepper flakes or not.