SOLVED. Retelling of Treasure Island in YA style, 2013-2014ish, blue watercolor cover? [s]

[Ziggi]

Looking for the name of (what I think was) a retelling of Treasure Island, that was marketed in the book shop as YA. I bought this and started reading it in 2013 or 2014, it had (what I thought was) a very pretty cover in blue tones, maybe with foiled letters and depicting some sort of boat?
I have not read the original Treasure Island so can't say how it differs, but from what I remember the story followed a young girl and maybe a young boy going on a journey on a boat to find a treasure.

[Elizabeth ♛Smart Girls Love Trashy Books♛]

Could it possibly be Silver?

[Ziggi]

Elizabeth ♛Smart Girls Love Trashy Books♛ wrote: "Could it possibly be Silver?"
Yes!! Thank you! Now i see why my googling got me nowhere - it's a sequel, not a retelling!
Solved!