These substances form one of the most commercially important groups of pigments, and their names sometimes reflect the location of a natural source, later transferred to the synthetic analog.

[1] Indian red is a pigment, a variety of ocher, which gets its colour from ferric oxide, used to be sourced in India,[2] now made artificially.

This colour was also produced in a special limited edition in which it was called Vermont maple syrup.

Venetian red is a light and warm (somewhat unsaturated) pigment that is a darker shade of scarlet, derived from nearly pure ferric oxide (Fe2O3) of the hematite type.

[13] The normalized colour coordinates for Kobe are identical to sienna, first recorded as a color name in English in 1760.