Tonal directions: Deep
A Deep dominant tonal direction is one in which the primary, most important aspect of a person's hair and eye colour (skintone is less relevant for Deeps) is that it has a deep, darker undertone, and needs Darker colours to look its best. Eyes will be dark and hair is dark brown to black. A Dark dominant person might be either an Autumn or a Winter in seasonal palette terms, depending on their secondary tonal direction, as illustrated below.
As you can see, the tonal direction Deep always translates to either an Autumn or a Winter palette, as both these are typified by more intense, darker colours. The secondary tonal direction dictates which of the two palettes it falls into.