White was born in Parker, Colorado, to Colleen and Richard White in 1994. He has an older sister, Brianna. White attended Legend High School in Parker. He stood under six feet until his senior year and was lightly recruited as a basketball player. By the time he enrolled in college, he had sprouted to his current height of 6-foot-4. White played on the varsity basketball team at Legend during each of his four years there. As a senior, he posted per-game averages of 17.1 points, 3.8 rebounds, 3.1 assists and 2.1 steals. White has taken part in multiple charitable events since reaching the NBA. In 2019, he joined Spurs teammates for the annual Champions Against Hunger Dinner in conjunction with the San Antonio Food Bank. Learn more about White by following him on Twitter (@Dwhite921) and Instagram (@dwhite921). White led the University of Colorado with 18.1 points, 4.4 assists and 1.2 steals per game in his senior year, the 2016-17 season. He was named to both the All Pac-12 Conference and All Pac-12 Tournament First Team, while also earning honors as member of the Pac-12 All-Defense team. He was the Pac-12's second-leading scorer during the conference season with 18.5 points per game. The guard was one of only two players in the Pac 12, joining Washington's Markelle Fultz, to rank in the top 10 in scoring, assists and blocked shots. White helped lead the Buffaloes to the 2017 NIT, where they lost to the University of Central Florida in the first round. White played his first three seasons of college basketball at Colorado-Colorado Springs before transferring to the University of Colorado. At UCCS, he garnered NCAA Division II All-American honors in his sophomore and junior seasons. The Parker, Colorado native was selected in the first round (29th overall) of the 2017 NBA Draft by the San Antonio Spurs.