An anthraquinone compound is provided. The anthraquinone compound has the following formula (I):

##STR00001## wherein one of R.sub.1, R.sub.2, and R.sub.3 is NH(CH.sub.2).sub.mCH.sub.3, and the other two are each independently selected from hydrogen or C.sub.1-4 alkyl group; and n and m are each independently an integer from 4 to 17.

This invention relates to electrophoretic fluid comprising solvents, a highly absorbing dye, and charged particles of different color, and electrophoretic display devices comprising such fluids.

This invention relates to electrophoretic fluids comprising a solvent, a dye, white particles, and colored particles selected from red, green, blue, magenta, cyan, yellow particles, and mixtures thereof, and electrophoretic display devices comprising such fluids.

Described herein is a method of dyeing the hair. The method includes applying to the hair a hair color composition including one or more direct dye compounds and rinsing the hair with water. The one or more direct dye compounds each include a blue-violet or blue chromophore, one or two permanent cations, one to four incipient cations, and one or more hydrophobic moieties. The incipient cations are pendant to the core structure and are neutral. The direct dye compounds enter the hair shaft after the hair color composition is applied to the hair. The hair color composition has a pH of from about 6 to about 11. The pH of the hair after rinsing is from about 3.5 to about 6. The rinsing of the hair causes one or more of the one to four incipient cations to change from neutral to positively charged inside of the hair shaft.