In this example, hair darkness and number of shoes a person owns are "not" correlated.
Correlation refers to a statistical technique that can indicate whether and how firmly combines of variables are related. For instance, tallness and weight are connected; taller individuals have a tendency to be heavier than shorter individuals.
On the off chance that there is no correlation amongst's x and y, that just implies that there's no relationship, association, or reliance between the two variables. You could consider it implying that x and y have nothing to do with each other.