The big challenge regarding her concept drawings was about finding an interesting clothing style which fits to her duty as a captain but makes it also easy to fight.
Curiously enough I came up with her color palette pretty fast. The strong saturation of her hair and coat gave her overall appearance a distinctive design.

Looking at my sketches it reminds me that a white/silver tone for hair would have also suit her personality well. However, since some of her crew members already had white hair ( plus the fact that there were actually a lot of dark-skinned characters with white hair in pop culture) I ultimately chose a different and more darker color which should convey her energetic and determined spirit.