One of my favorite of the many orange butterflies is this Julia Heliconian, Dryas julia (linked to my gallery with much better photos) and not just because my special needs daughter was named Julianne! 🙂 Though probably related! 🙂
Depending on the light and the individual insect, the bottom of the wings or side views like below can be a beige, light tan or pale orange color rather than the bright orange always on the tops of the wings. See 2 or 3 like that in the gallery. Plus it is easy to confuse the top of the wings with the Juno Longwing I shared the other day, with only a slight design difference, though the bottom of wings are totally different between those two.
¡Pura Vida!