The colour ranges from a soft purple-reddish hue to darkish brown. The caudal fin is olive brown to a darkish green-brown with darker margins. The lips are whitish and usually lightly fleckled with a darkish brown. The larvae are darkish grass green with a yellowish-green head. The upperparts are darkish brown to gray-black. They are generally largish darkish petrels, but may have white undersides. The fungus darkens when bruised and older specimens may have darkish patches. They are usually darkish green but sometimes have coloured edges and central ribs. The cells be viewed as darkish brown or orange colonies under a microscope. There is a horizontal indistinct darkish band along the flanks. The adult female is slate-grey above with darkish wingtips. The color of the petals can range from darkish pink to purple. Pacific and Atlantic bonito meat has a firm texture and a darkish color. The head is of the body-colour with or without symmetrical darkish markings. The very earliest ones, c 1910, were just a plain darkish blue ribbon.