The Most Mauve There Is — Nancy Springer

Middle-schooler Avery Holsopple is already struggling with the fact that he's the shortest guy in school. To make matters worse, his older sister Valerie has insisted on having a Victorian-style wedding, which means Avery is about to find himself dressed up in the worst color he can imagine for a boy: pink. Of course, Mom insists the color is "mauve" but Avery's eyes know the truth. Desperate to get out of his duties he hatches a plan with Mark, Valerie's fiancé, and ensures that this wedding is one that nobody is ever going to forget.