The protagonist is one of Amber's princes Now his fleet is sailing to Amber through ShadowsㅡAmber's parallel worlds. I saw the fleet, sailing on a great ocean the color of blood. I wondered. In the Shadow worlds through which they sailed, many of them would be lost. [Nine Princes in Amber" of The Great Book of Amber by Roger Zelazny] I'd like to know how "of" can be omitted before "the color of blood." Thank you in advance for your help.