This is NOT just a minor change to the model; this took me 2.5-3 hours in the slicer to paint very carefully.

I printed two side by side on my Bambu with 0.85 flushing volumes and a prime tower.

You may want to reduce the flushing volumes ratio in either Orca Slicer or Bambu Studio if you want to intentionally bleed some colour into the sails for white/dark brown.

If you don't have light brown as well as dark brown PLA then just set both browns to the same filament in your slicer; it's only the deck which is a light brown c.f. the ship hull and struts in chocolate brown.

NEEDS supports. I used 30% overhang threshold in Bambu Studio with auto tree supports which are super easy to remove once printed without worrying about snapping the whole model to pieces; as long as you aren't too rough with the result of course!