01 Which of the following is a highly readable combination?
Answer and explanation
Correct answer: B. White text on a dark blue background
Explanation: The governing concept is contrast for readability. White text has a very light value, while dark blue has a much darker value, producing a strong separation that keeps letters visible and easy to scan. Thus option B is the highly readable combination. The other choices place light text on light backgrounds or similar warm colours together, so their value contrast is weak and the words are harder to distinguish.