Step 1: Understanding the word "vivid."
"Vivid" means bright, clear, and full of life or color. It is often used to describe something that is striking or intense in appearance.
Step 2: Explanation of options.
- (A) Bright: This is a synonym of "vivid," not an antonym.
- (B) Dull: Correct. "Dull" is the antonym of "vivid," as it refers to something lacking brightness, color, or liveliness.
- (C) Clear: This word is related to the concept of vividness, but it is not its opposite.
- (D) Colorful: "Colorful" is a synonym of "vivid" and does not serve as an antonym.
Step 3: Conclusion.
Therefore, the antonym of "vivid" is "dull."
Final Answer: Dull.