Dark Is Evil/Playing With

Basic Trope: A villain with relations to the Dark.
 * Straight Emperor Evulz is the Big Bad in a black outfit with the Power of Darkness
 * Exaggerated: Emperor Evulz is an Obviously Evil Complete Monster in Black and the Darkness is so evil that everything within sight dies.
 * Justified:
 * He's a Demon.
 * He grew up somewhere dark and scary.
 * The story is about Good vs Evil. He has to make it obvious that he's evil.
 * Inverted: Light Is Good/Dark Is Not Evil
 * Subverted:
 * Despite wearing black, he has connections with the Light.
 * He's actually a good guy in black.
 * Double Subverted:
 * His One Winged Angel is actually a Black Demon with darkness powers.
 * He was a mole/Makes a Face Heel Turn.
 * Parodied: Lightbulbs die the minute Emperor Evulz is even mentioned.
 * Zig Zagged:
 * Emperor Evulz frequently switches costumes, roughly half of which are black.
 * Or, Emperor Evulz is a Heel Face Revolving Door, switching between being a villain and a hero every other episode, whilst keeping his black attire and powers of darkness.
 * Averted:
 * Despite his signs of darkness, he isn't good or evil.
 * No one wears black or has darkness-related powers in the series.
 * Invoked: "We have to make it REALLY obvious who is the villain here. Give him a completely black costume and Darkness related power."
 * Exploited: Knowing that black attires intimidate people, Emperor Evulz makes sure his wardrobe is stuffed full of them.
 * Defied: He's the Token Good Teammate on the side of evil.
 * Conversed: "Black again? You're not very imaginative, are you? Colours are fun, you know."
 * Enforced: "We need to make a villain in Black to combat the Hero in White."
 * Lampshaded: "That Emperor Evulz guy loves to wear Black a lot."
 * Discussed: "Yep. The guy in the black is Obviously Evil."

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