Bring a large pot of lightly salted water to a boil. Add tri-color pasta and cook until al dente, about 10–12 minutes. Stir occasionally to prevent sticking. Once done, rinse under cold water and drain thoroughly.
In a bowl or mason jar, whisk together the Italian dressing and salad seasoning mix until well combined and smooth.
In a large salad bowl, add the cooled pasta, diced cherry tomatoes, all bell peppers, and chopped olives.
Pour the dressing over the pasta and vegetables. Toss everything gently to coat evenly.
Cover and refrigerate the pasta salad for at least 8 hours or overnight for best flavor before serving.
Keyword Classic pasta salad, Easy summer pasta salad recipe, Pasta salad recipe, Summer pasta salad