As nouns the difference between purple and purpleness
is that
purple is a colour/color that is a dark blend of red and blue; dark magenta while
purpleness is the state or condition of being purple in colour.
As an adjective purple
is having a colour/color that is a dark blend of red and blue.
As a verb purple
is to turn purple in colour.
As a proper noun Purple
is {{surname|from=Middle English}.