Keep it simple! Developing a bridge could be very risky, try hard to keep it simple to minimize risk.
Black is #080000, this is 漆黒 - Sikkoku
White is #F6F7F8, this is 月白 - Geppaku
Accent is #F19072, this is 東雲色 - Shinonome-iro
NFTHashi motif is sunrise, above black, white and accent colors give a feeling of right before the dawn.