The invention provides a display medium having a dimmer layer which
comprises at least two kinds of charged mobile fine particles. Each of
the at least two kinds of the charged mobile fine particles respectively
has different coloration and a different mobility, and the charged mobile
fine particles of at least one kind of the at least two kinds show
coloration when in a dispersed state. The invention further provides a
display device having an electric field forming unit and the dimmer
layer. The invention further provides a display method which uses the
display medium and includes putting the charged mobile fine particles of
at least one of the kinds being dispersed while having other charged
mobile fine particles not being dispersed.