Associating emotions with colors is a subjective and metaphorical exercise. Different people might perceive emotions differently and assign various colors to them based on personal experiences, cultural influences, and individual associations.
That said, anxiety is often associated with darker or more intense colors. Many people might describe anxiety as a shade of blue or gray, representing feelings of unease, worry, or sadness. Some might also use darker colors like black or deep purple to depict the heaviness and overwhelming nature of anxiety.
However, it's important to remember that these associations are not universal, and some individuals might perceive anxiety differently. The experience of anxiety can vary greatly from person to person, so there isn't a definitive answer to what color anxiety would be. The color representation of emotions is ultimately a creative and individual interpretation.