It is surely unwise, indeed very wrong, unjust and replete with prejudice that people should be measured by their clothes. It has been an accepted aphorism that the frock does not make the friar. For that matter the boilersuit does not make a mechanic, or the tutu a ballet dancer. Yet we unconsciously, or perhaps sometimes even knowingly, form first impressions, some alas very lasting, on the basis of a person's apparition in that day's chosen apparel.
Elegance is eloquent, often enchanting.
Fastidiousness is characterising. Studied nonchalance betrays. Negligence as to appearance can be deciphered in many ways. Mismatch in colours can be explained away by excessive haste or can even provide suspicion of daltonism. The truth is that what we put on does not merely cover, at least partially, our bodies.