colorless
adj.adj. having no color at all, like water or clear glass. It can also describe something boring that does not have any interesting or exciting qualities.
adj. lacking distinctive color or hue; transparent. In a figurative sense, it describes a person, performance, or political style that lacks character, vitality, or interest.
The liquid in the bottle is colorless and smells like vinegar.
Critics described the candidate's speech as colorless, noting that he failed to inspire the crowd with any new ideas.
Despite his technical expertise, the minister was often sidelined due to a colorless public persona that failed to resonate with the more passionate segments of the electorate.
From color + -less.
Often used figuratively in political contexts to describe a lack of charisma or ideological distinctiveness.