What colour cover attracts? White?

Readers choose to buy a book for various reasons – there is no one guaranteed way to catch someone’s eye.
When it comes to covers, do particular colour schemes catch your eye?
Some authors feel a simple white cover is most appropriate for their book – while this works well with seeing a book on a shelf, it has its own challenges when showcasing covers online. Below are the TSL publications with white covers (well, mostly…)