"Dark with excessive bright" is an example of

an oxymoron

Explanation:

Dark with excessive bright is an oxymoron because the adjective dark contradicts the adjective bright.

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themselves

an intensive pronoun is a pronoun that ends in self or selves, such as himself, herself, themselves, yourself, ourselves. since band members is a third person plural, the correct intensive pronoun would be themselves. if the band was talked about as a collective noun, itself would be the appropriate intensive pronoun. intensive pronouns are used to add emphasis to the noun it's modifying which is why it directly follows it.