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Which is correct CSS statement to define blue background color with opacity?

6. Which is correct CSS statement to define blue background color with opacity?

1. background-color: rgba(0, 0, 255, 0.3)
2. background-color: rgba(0, 0, 255, 255)
3. background-color: rgba(0, 255, 255, 0.3)
4. background-color: rgba(0, 0, 1, 0.3)

Answer: A) background-color: rgba(0, 0, 255, 0.3)

Explanation:

The CSS statement (background-color: rgba(0, 0, 255, 0.3)) specifies the blue background with an opacity.