A selection of blues which may be useful for bathymetric maps. Use makecpt to impose an appropriate range.
Blues 09
GnBu 09
PuBu 09
YlGnBu 09
cyanotype 01
cyanotype 02
cyanotype 01
Deep Sea
sky-blue
purplish-blue
jeans
crisp-ice
rain
blue
twilight
blues
pastel-purple-blue
occ019
occ079