Indeed ! As written by Matt & Alexandre of they book around the Navy Rums,
The 7 Pilars of this rum style include sugar browning, that color and also affect taste, very differently than with caramel 150E.
They are also talking about real ABV = 55.7%, old rum casks, big open vats blending, and nice stuff.
Book is available there is interested : https://www.wonkpress.com/
NB : if someone need samples to try new navy, DM 