White
noun
The kanji and the word are exactly the same. That means they share meanings as well.
しろ
Since this word is made up of a single kanji, it should use the kun'yomi reading. When learning the kanji, you didn't learn that reading, so here's a mnemonic to help you with this word: White surrounds you. The sheer (しろ) amount of white is overwhelming.
わたしのウェディングドレスは白です。
My wedding dress is white.
この白はクリームっぽい白ですね。
This white is a creamy white.
白とピンクがラッキーカラーなんだって。
White and pink are apparently my lucky colors.