When it comes to pairing colors in fashion, there are no hard and fast rules, as personal style and individual preferences play a big role in the final outcome. That being said, there are some color combinations that tend to work well together and can create a visually pleasing look.

In the case of a light orange shirt, there are several colors of pants that can work well with it. Here are a few suggestions:

1. Navy blue: This color complements orange nicely and creates a classic, timeless look.
2. Khaki or beige: These earthy tones pair well with orange and can create a relaxed, casual vibe.
3. Olive green: This is a complementary color to orange and can create a unique, stylish look