This is one of many poems written by Emily Dickinson that deal with the topic of death and the state of being dead. The opening question is repeated throughout the poem in various guises, which serves to reinforce the way that the dead exist in a realm that removes them from the cares of the living, such as the seasons and the different kinds of weather and the summons of the crow in the early morning. They have entirely different priorities from the living, the poem implies. Note how the colour purple is used in the first stanza:
What care the Dead, for Chanticleer—
What care the Dead for Day?
'Tis late your Sunrise vex their face—
And Purple Ribaldry—of Morning
The colour purple is therefore used to describe the "Purple Ribaldry" of the morning light as the sun rises. What is interesting about the usage of purple in this poem is that normally in Dickinson's poetry, purple is a colour that is associated with dignity and with emperors or Christ's nobility. Here, it is coupled with an adjective that means "obscene" or "coarse." Perhaps Dickinson suggests here that the beauty and splash of colour of the sunrise can be considered obscene in the face of the solemnity of death.