The Vita classical A1 – D4 shade guide serves to accurately determine tooth shade. The arrangement of the shades in the Vita classical family of shades is as follows: - A1 - A4 (reddish-brownish). - B1 - B4 (reddish-yellowish). - C1 - C4 (greyish shades). - D2 - D4 (reddish-grey).