Wash and chop the cucumbers, red bell pepper, orange bell pepper, and red onion into small, bite-sized pieces. Finely chop the cilantro and combine all in a large mixing bowl.

In a separate bowl, whisk together lime juice, olive oil, chili powder, salt, and pepper until well-blended.

Pour the dressing over the chopped vegetables and gently toss until evenly coated.

Cover and refrigerate for 15 to 30 minutes to allow flavors to meld.

Serve cold, optionally garnished with additional cilantro.