The earlier you add fresh chiles to a recipe that you're cooking, the hotter the bite will be. If you like a more mild bite then add them to your recipe at the last possible moment.
Aji Amarillo is a yellow chile pepper common in Peruvian dishes. Sometimes you can find this variety of chile green or orange as well depending on the maturity of the fruit. It has mild to medium heat.
Anaheim peppers also known as New Mexican chiles, can range in heat level depending on where they are cultivated, maturity level, and how they are prepared. These chiles range in color from light green to red. These peppers are commonly used in decorative chile hangings called ristras.
