Place fingerling and red potatoes in a saucepan; cover with water. Bring to a boil. Reduce heat; simmer 15 minutes or until tender. Drain; cool slightly. Place potatoes in a large bowl.

Place blue potatoes in a saucepan; cover with water. Bring to a boil. Reduce heat; simmer 10 minutes or until tender. Drain; cool slightly. Add blue potatoes, onion, parsley, dill, chives, and eggs to bowl; toss gently.

Combine vinegar and remaining ingredients. Pour over potato mixture; toss gently to combine. Serve warm, at room temperature, or chilled.