In the book it was something like blue, even though this cannot happen in real life. Driftwood fires are actually yellow.
The salt in the driftwood turns the flames blue/green.
Driftwood is first mentioned on page 102 of the book "Hatchet" by Gary Paulsen, where Brian uses it to start a fire.
George Allen Buffum has written: 'A driftwood fire'
Take the metal bucket, fill it with water. Put it on the fire that you made with the palm leaves, driftwood, bamboo, and matches. Note: Do not put it directly on the fire, put if above the fire on a rack made of bamboo supported by driftwood. Let the water boil, have a palm leaf above the bucket. Drops of water should condense on the leaf, catch it with the empty coconut.
Lilac.
Driftwood
dark blue
White
that it is a cool colour
orange
black
i think its silver