Brightness (Value) Sequence for the Vita Lumin Classic™ Shade Guide Reassessed

The purpose of this study was to locate the 16 shade tabs from the Vita Lumin ‘Classic’ shade guide within the quantitative Luminosity, R, G and B scales (0–255 scales) using Photoshop® software. A new value order arranged according to the Photoshop® scale demonstrated a more linear relationship between the 16 shade tabs than the order given by the manufacturer. A Brightness Index representing the percentage difference in value between pairs of reordered shade tabs is suggested as a more realistic determinant of change in shade tab value. KEY WORDS: Brightness; value; shade guide