Explain the following statement and its significance. "The less taste a person has in dress, the more obstinnate he always seems to be.

This quote relates to Harris. Jerome blames his lack of "style" or dressing in colors that suit him for his obstinance. This alludes to the fact that Jerome believes the clothes make the man. 

Harris always keeps to shades or mixtures of orange or yellow, but I don’t think he is at all wise in this.  His complexion is too dark for yellows.  Yellows don’t suit him: there can be no question about it.  I want him to take to blue as a background, with white or cream for relief; but, there! the less taste a person has in dress, the more obstinate he always seems to be.  It is a great pity, because he will never be a success as it is, while there are one or two colours in which he might not really look so bad, with his hat on.