Ghostly tennis ball

Hello, would someone like helping answer this question?
It is from ‘ the borrowers avenged’

Arrietty never had seen such a moon. It hung pallidly in the sky,from which the colour was slowly draining,like a ghostly tennis ball!

Does the ‘ ghostly tennis ball ' means white table tennis ball or tennis ball? But if it is tennis ball, does normally tennis ball is green?

Many thanks!

little black bean
  • heypresto

    Senior Member
    English - England
    I think it is a 'regular' tennis ball. At the time the book was written, like they were in my youth, tennis balls would have been white, or just off-white.
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