There is no definitive answer to this question as Jack London's favorite color is not widely documented or known.
blue
what is Jack Gantoes favorite color
what is Jack Gantoes favorite color
Orange
orange
Wild By Jack London
Blue and red
Apparently it's, Yellow.
I think it's blue or green
winsdor in London on January 19th January
orange
yes jack London is the same person as john London. he adopted the name jack.
Jack Frost is a fictional character. He is known as turning things to ice. So perhaps white or light blue.