Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you:
Think of black things. One very common black thing is the common crow (くろ). Associate those two together.
Can you get me the black hat up there?
That man with the black goatee is notorious for being black-hearted.
My favorite channel on TV is called "Black Screen." It only airs when the power goes off.